People who have dug through canon worm have said that the bay is meant to have up to 20 more capes than was shown. One canon quote even implies the Empire may have had an extra 5 capes. Other than Stain who is mentioned in Interlude 2 and then never again these are left as unknowns so it is fair to have oc capes. That said it must be kept reasonable as a reason they didn't appear or weren't named needs to be included and no-one likes it when some oc cape shows up who has the perfect power to support a protag or is their ideal waifu shows up.
Fortunately canon does supply plenty of options here due to events like the ABB bombings and levi being able to be said to have killed them or made them flee the city and that there are the heroes Sere and Dovetail who are only mentioned post levi when the prt is desperate to fill out their roster because they were active in the suburbs.
Cape Name: Stain
Gender: Male
Trigger: In area of cape fight between Purity and New Wave fliers one of Purity's beams hit a building he was nearby and broke bits off that nearly crushed him.
Power: Shaker similar to skidmark creates areas within his range marked by a non organic only manton limited stain generated by gestures to aim. Stained areas have reduced durability, slowly spread from point of origin for a fixed area each stain, are discoloured and becomes soft and somewhat spongy.
Alignment: Leader of own Gang
necessary secondary powers: his power doesn't effect his own clothes and shape the spread of the stains
General activities: Leads own very minor gang and causes minor issues is generally left alone because he can effect costumes especially of capes like tinkers who wear armour and gear that protrudes past their body's manton field which makes fighting him more hassle than it's worth.
Reason didn't get mentioned in canon: Did in Interlude 2 but following it as stated there he tried to expand into ABB territory only to face Oni Lee and die.
Reason for creation: exists in canon but never used anywhere
Cape Name: Yuki Onna
Gender: Female
Trigger: Aryan girl who grew up in the outskirts of the bay with a Japanese neighbour because they were both single mothers their mothers became close working together to raise both kids. Despite this as a young teenager when out Empire members came when they were together to 'protect' her from the friend. She backed off afraid off the thugs who were enjoying tormenting her friend including saying all the things they could do especially since Victor was wanting people to drain for skills. Said friend ended up roughed up and drained seriously enough to be able to recover but seriously impaired.
Power: Mover/Changer with Shaker, Blaster, Stranger and Brute subratings on Changer. Regardless of whether she is in the changer form she can fly but the form causes her skin, lips and hair to whiten and become cold, her eyes also become purely white so it is difficult to tell where she is looking if you can see them. The further she pushes the transformation the stronger she becomes and while in it she is able to shoot cold windy streams that contain snow which can be ice if fully transformed. She also emits a cold aura which lowers the temperature around her and can be pushed when fully transformed to generate a blizzard within a block's radius of her.
necessary secondary powers: Her skin being cold also serves as great protection against fire and heat due to being a fixed temperature with any heat being shunted into another dimension which allows her internals to be unaffected by the cold. She can also see through snow and ice fine along with not needing to blink while in the form.
Alignment: Vigilante
General activities: Donning an Asian cape identity as a form of penance she works mainly against the empire in the outskirts and suburbs around her home.
Reason didn't get mentioned in canon: Due to staying on the outskirts and suburbs combined with only facing normals her full power is unknown. She is also a fairly bad option for teams due to her power not discriminating and so being unpleasant to fight or to fight alongside. The ABB would also step up recruitment attempts since her flight makes her hard for any group to actually manage to talk to.
Reason for creation: The Nazi's are a fairly minor element of canon so this is showing a non minority working against them. Considering Changers come from body image issues and those of self image vs society's expectations you'd also really expect more in the bay.
Cape Name: Shadow
Gender: Female
Trigger: Her father was an Asian hero who Lung killed in costume during his initial appearance and taking over of the Asian community. She didn't know it at the time but later discovered the hidden underground area where he had his cape stuff. While nothing actually came of it due to his body being completely burned to the point of being unidentifiable which was fairly common along with people running she had been afraid in general due to the ABB's rep and that pushed her over to triggering with his shard that had moved to her after her dad's death.
Power: Breaker with subratings in Mover, Stranger from her own power and the shard cheated to count as a 2nd gen to pass a variant on her dad's power of Striker. Her power is basically being able to dive into shadows including her own. She can move around as a fairly dark shadow within shadows. While in the shadow she can move at the top speed she could run at with all the weight that she has taken with her which includes the ability to move up walls and onto roofs. Her dad's power was the ability to control the friction of shaded areas he could touch or that his shadow was touching along with a scaling brute rating for how large an area this was. He mainly used this subtly and only on himself by wearing a full covering of armour and katana in a samurai outfit and going out at night since the shard counts darkness from lack of light as shadows with the most overt use being to allow him to slide his feet along the ground without lifting them such as if he were wearing socks on wood. Against Lung though the light from the fire was a hard counter. Her variant lacks the brute component but has a wider range of counting any connected shadows for the friction adjustment.
necessary secondary powers: sense of the areas that she can effect the friction of including their current friction, how fast she can move while submerged and what shadows are large enough for her to submerge into. While submerged she can also see out of the submerged surface.
Alignment: Independent
General activities: She keeps her cape activities concealed and as such is unknown. Her costume is also fully concealing but carefully avoids any Asian theme including ninjas to avoid attention if she does get seen. Her focus is on sabotage, building intel and a shadow destabilisation while also pocketing a few dollars every week to subtly ease their financial situation and build an emergency stash. Her power does slightly boost her movement speed due to advantages of moving through shadows and moving at a sprint without expending stamina but is still fairly limited so for the most part does stake outs of a few bases she knows off while taking opportunities to skim funds or product from them while occasionally using or leaking info she gets but is careful to leave signs that it's their own members skimming which the merchants in particular are weak to.
Reason didn't get mentioned in canon: is unknown
Reason for creation: Considering the general circumstances of the Asian population it's a bit unbelievable how few capes they have in the bay also to give a shadow power to someone that isn't black because it seems racist.
Cape Name: Contender/Pinnacle
Gender: Females
Trigger: the pair of twins have divorced parents and each live with one of them. Contender stays with their dad and as such is more intellectual while Pinnacle learned more fashion and appearance tips along with being more sporty. Basically the two are a classic introvert intellectual / exceptional extrovert pair with Contender always being deemed inferior due to the difference in looks and fitness since Pinnacle is very talented physically. This general sense of inferiority and pressure led to Contender triggering with Pinnacle getting it for free due to the rules of twins.
Power: Changer/Thinker The shard doesn't really get the issue since twins both get powers if one triggers because they are considered the same so the power is about being the inferior model. They have a changer form that ages them up from when they triggered at 14 to appear as a prettier version of how Pinnacle could be projected to look at 18-20 that is also generous in it's fitness but being within human limits if still someone that would be able to get onto an Olympic team. The other power they have is that their physical skills never degrade. Physical skills being something like running form and not being anything knowledge based something like computer programming could only be assisted through things like typing accuracy or speed and not from any programming boost. Each transformation into or out of the form also converts them to a stored template which is fixed for the form and updates for out of it which means it heals injuries.
necessary secondary powers: the healing from the form shifting along with updating senses to account for new body.
Alignment: non determined/ex independant
General activities: The show of contrasts continued Contender since the trigger has been working on their fitness and learning skills like fighting and parkour without being obvious she is prepping for being a cape which has lead to some bad habits from doing things like copying from movies or bad online videos. Pinnacle though initially thrilled about having powers was pretty disappointed because of how little they did for her especially when they barred her from professional sports. Pinnacle however took the chance for what it's worth and used it as a chance to bypass age restrictions on things along with making a cape id for the attention. Both of these did not go well for her hurting her cash reserves while damaging her relations with her friends and getting some nasty attention. Following some bad incidents at a party and actually getting attention from other capes which included her initial cape identity taking heat for inaction during crimes she retired both identities to revaluate the situation and lay low while repairing things with her civ life.
Reason didn't get mentioned in canon: not debuted yet/retired pre canon
Reason for creation: very closely related people like twins can both get powers when one triggers which little is done with.
Cape Name: Cypher
Gender: Male/Female
Trigger: A teacher who had an issue as part of the power watch program where a kid with powers was reported by another teacher but due to being black didn't trust the authorities so when the prt showed up to speak to the kid they freaked out at how heavy handed and unsubtle they were being and chose to fly away through said teacher's classroom while using their blaster power outing himself / A woman from a rich family with enough money she only had to get a token part time job as a music teacher for the same Primary school for appearances sake but didn't like all the politicking and liked having college and then job as an excuse to stay away and move out. Unfortunately being a teacher wasn't as simple as she'd liked because she found out the teachers are meant to report any suspicions of students having powers and received some hazing over her family.
Power: Power Copier by touching a cape he can use their power for a few minutes baseline which increases in proportion to the touch/ A communications tinker owing to the definitions of communications used by her and shards this features a lot of hacking and activities that support gunboat diplomacy with information.
necessary secondary powers: duration of copied power/standard tinker stuff
Alignment: Rogue
General activities: They are teamed up to the point of sharing a cape identity. To prevent this being realised they don't appear in public and usually stick to online text communication but each have a covering identical costume and voice filter along with avoiding anything like pronouns that would convey gender. Being a power copier he can support the tinkering while also providing a second view and inspiration source. Due to seeing the prt screw up and having the means to go searching for info they are determined to avoid the prt while working to support young capes and keep them safe. To this end they focus on data gathering and serve as informers and info brokers who would hold the pho guy in the know tag if they were willing to be that concentrated instead of using various sockpuppet accounts and obscure means along with putting info beyond villain capabilities into the public domain.
Reason didn't get mentioned in canon: Not a field cape while avoiding contact with other tinkers and thinkers especially those in groups.
Reason for creation: The canon prt power watching is pretty outrageous given that it includes things like someone telling a nurse while feverous and delirious on top of being high on meds and having a head injury that they are a cape and the prt investigating it. Through Browbeat we also know they are pretty unsubtle about poking around with their investigations into his trigger event to try and get confirmation before speaking to him leaving his identity rather flimsy so this is a case where it puts people off joining them.
Cape Name: Neigh Mare
Gender: Female/Male
Trigger: Cluster trigger as part of Circus's (both set to kiss on each other, neutral to Circus and kill on the last who is dead) caught up in protests surrounding Fleur's death which attracted Empire goons response. Circus was an organiser and pusher for due to budding gender fluidity and was dealing with that and the general strain which topped over when violence started due to 4th member being leader and being interested as anti Empire action due to being some element(s) that nazis don't like which they worked out and was killed shortly after triggering. Neigh and Mare were younger and general members in the crowd with Mare being a general sign holder and Neigh just being someone there as someone paid to bring food to the protesters.
Power: Due to being Cluster capes with Circus they have variants on Circus's powers which are fireballs, hammerspace, enhanced agility/reflexes/balance/spatial sense/aim and male/female body language understanding. Due to trigger mechanics each has a major power which is from their shard and is stronger to avoid making the cluster huge I am bundling Circus's 5 enhancements together as one power even if agility isn't a thinker power like the rest and saying that is their main one since it's either that or the hammerspace but since we don't know the limits either is fair to say. Each variation doesn't have to be the same category unless it's something like a tinker power for example Love Lost has an emotional focused shard which for her is a blaster/master power but for Rain is a shaker power and for Snag is a Striker power done through his tech.
Mare is actually the guy and his main power is the main form of the fireball power which I am saying is an elemental effects one in his case it turns him into a shadowy equine breaker form with shadowy wisps constantly drifting upwards off his body that diminish as he charges the forms other power to shoot condensed shadow blasts from the mouth or waves from the hooves. From the space power he can treat any surface as the ground allowing him to run up walls or stand on mid-air including effecting gravity for him and anyone on him. From the enhancement suite he gets enhancement to the forms parameters and boosted coordination of it's limbs and from the body language one he gets understanding of equine body language, riding and behaviour enough to act as an actual horse if visuals didn't give it away.
On the other hand Neigh from the elemental power got the ability to form a material that looks like obsidian on herself which actually weakens the further from her skin it gets but can be actively reinforced and repaired from any point of contact allowing anything actually touching her to be decently strong and sharp but not strong enough to stand up to big hits. The weakness of the material also means that aside from material generated from her power she only wears shorts and a thin exercise crop top to allow the extra skin contact. Anything generated that she isn't in contact with though is fragile and quickly disintegrates. Neigh uses this to form a costume and saddle for their cape id with a full body cover layer as the base but with thicker growths to have it serve as armour. From her own shard Neigh gains a space manipulation power that let's her alter the space around her causing objects moving around to her to selectively be treated as though they are crossing more distance than they are. This effectively is an anti ranged power causing projectiles to fall short or miss due to losing power due to facing greater air resistance and effects from gravity. While it can also allow her to be treated as out of range or further away for range based powers for close combat the main advantage is in defence by increasing the energy they spend for the blows which doesn't usually matter too much due to only fliers really being able to who move with their flight power's support and expanding the time any impacts are treated to happen over which lowers their impulses while also providing more effective time for the repair aspect to take effect in. This power also works as protection against the material shattering as any shards moving towards her get slowed and decay more. From the enhancement suite she gets a boost to timing, multitasking and general self coordination to help with managing the main power and reinforcements. From the body language source she gets a more general understanding of a focuses body language which in exchange for being broader doesn't allow her to alter her own body language aside from working out what about their body language is prompting it's results.
necessary secondary powers: the dark wisps and 'obsidian' are chilly due to not being shadow or earth powers and being that the shard is one of the dimensional ones that do fire/ice but heat shunting tricks which it is using to fake shadows and obsidian as a result both are resistant to temperatures though more so on the cold side. Mare also has a sense of which direction is actually down. Neigh has a general boosted awareness of movement around her due to her main power.
cluster bleed and power sway: the 4th member died pretty much right after triggering so their effect ended and derailed the overall plan but it was going to be them and Circus against those two due to them being the body language main and so being able to be able to read and push Circus into anti Empire action in addition to general thievery. The bleed was effectively passing the feelings they have for each other along after they meet each other which was supposed to reinforce the pairs dynamic due to reinforcing the positive feelings of each pair as teammates while reinforcing the negative feelings towards unknown cape(s) that they don't get on with and the power sway would alter slightly as they wrack up wins against each other.
Alignment: Independents
General activities: Cape name is somewhat of a joke for combining their two separate cape names into one while also being a play on nay more and nightmare. They don't see themselves as being that strong capes and effectively teamed up to act as 2 capes in a trenchcoat to pretend to be a decent one. Both of them required a fair bit of practice and adapting to their powers to be anywhere near decent but quickly realised their initial big dreams were a bust. Mare on his own is alright but required a while to get used to being on all 4s, the general size difference, the field of vision difference and all the 3D movement. He needs Neigh mainly to cover his back, keep track of things and provide ranged defence. While she needs him for mobility, offence and to actually allow keeping of distance. Since he has taught her how to ride properly and she can read his horse body language plus general coordination boosts they can work decently together but suffer from her having to use touch or speech to speak to him which isn't great for not tipping their hand. Due to this they quickly gave up thoughts of cape fights and stick to just having fun with their powers on joyrides while spooking the odd gang members but have had to dial that back due to now being in a higher year.
Reason didn't get mentioned in canon: Only show up at night due to boosted stealth aspects of being a black horse and black armoured rider and have dialled appearances back in general to avoid giving away they are students.
Reason for creation: Clusters allow a bit more flexibility in giving multiple powers and Circus is part of one that nothing has ever been done with.
Cape Name: Seahorse
Gender: Female
Backstory: Originally a young girl cape who triggered over a decade precanon meant to be a big name for the UK team but then I remembered they are supposed to be having financial difficulties which such a cape would disallow. A later thought was to consider actually using the 3 blasphemies and say they are a group from a past cycle that managed to hijack a few tinker shards and incorporate the 3 blasphemies as a cycle element while they subtly work on countering the entities long term by developing themselves and hindering data collection. Backstory note is there were more than 3 but the others got stopped some may also have been lose over time such as in the transfer to Abaddon but Eden's death would have pushed them into trying harder this cycle. Seahorse would be one id in this case to work publicly while the blasphemy bodies would be for black ops since Europe is better off than anywhere other than places like New Zealand that wildbow forgot about or didn't place something big like the cui next to that would cause problems.
Power: water speciality tinker in Eden's simulation would have been water power and one of the quick prop up loose restriction tinkers in her case designed to have great synergy with other tinkers by supplying power sources but be a prime target and have low combat power. Deviations from scenario add great combat capability through water cutters and hoses through less specific speciality or through it being a blasphemy.
necessary secondary powers: general tinker abilities
Alignment: European official cape team
General activities: In both versions Seahorse would be a fairly prominent tinker and much desired due to her easy to use clean energy sources. She would be somewhat like the guild though in that she wouldn't do normal patrolling and be focused on big threats. In the first version she would also have pr stuff like public appearances but it would be with stand ins.
Reason didn't get mentioned in canon: Europe based
Reason for creation: lack of foreign capes or 3 blasphemy use.
Cape Name: Burrow
Gender: Male
Trigger: case 53
Power: A mole like case 53 who is great at digging backed up by an earth moving power.
necessary secondary powers: earth sense
Alignment: Cauldron
General activities: making bases/stashes
Reason didn't get mentioned in canon: Cauldron
Reason for creation: they have a huge base with no explanation for how they got it built and it annoys me they never thought to make supply caches or bases for the end beyond having some supplies in their own base.
Cape Name: Adamantine
Gender: Male
Trigger: vial cape
Power: master cape who can project a metallic looking creature that resembles Mantine. It is large enough to ride and can fly the Remoraids can also be generated and fired but for serious fights lies in it's mouth.
Alignment: Own team
General activities: n/a
Reason didn't get mentioned in canon: didn't take vial
Reason for creation: In canon Skidmark gets his hands on a set of 5 vials in an abandoned house in the rich section of the bay. While possibly a Contessa plot due to the info it revealed to Taylor, Lisa and Faultline's crew I am saying he is a rich man who bought the vials for security and to become their own team due to wanting to pass as legit capes he bought vials that consistently give flight and projection powers.
Other members: His wife Phoenix would have been able to project phoenix wings from her back allowing her to fly and their feathers can be shot as projectiles. Their eldest son would have been able to fly and fire scale projections. Their younger son would have had a short range projection of a hawk while their daughter would have been able to project chains from her limbs.
Cape Name: batwoman
Gender: female
Trigger: long con Russian sleeper agent from a honeypot mother who was secretly training and teaching her following the appearance of Behemoth Russia went full isolationist in canon so while they didn't get burned they got cut off which her mother didn't take well and got herself killed trying to prove her worth by faking being a cape.
Power: Fabric tinker
necessary secondary powers: general tinker abilities
Alignment: Independent hero
General activities: Designed costume (batwoman from mystery of the batwoman) to play into their codename and general American culture costume isn't tinker tech but is a product of it so is far tougher than it looks, the cape can also become rigid to serve as a glider or shield and the costume subtly alters her body shape uses mundane training to keep up. Due to the cut off and upbringing is distrustful of governments but did take the cut off message about the threats like the cui and endbringers seriously moved to the bay to work against the gangs to build up a rep to join the guild.
Reason didn't get mentioned in canon: also leans heavy on stealth but got herself killed moving against the ABB
Reason for creation: doing something with Russia going isolationist
Cape Name: Henshin
Gender: Male
Power: Fabric tinker
necessary secondary powers: general tinker abilities
Alignment: Sentai Elite
General activities: one of the pillars of the sentai
Reason didn't get mentioned in canon: dead
Reason for creation: Masumune is stated to be one of the key pillars of the sentai due to being able to mass produce tinker tech but he would have needed other tinkers to work with since even if he could make some of it he probably wouldn't be able to do all of the guns, weapons and costumes to say nothing of if they covered stuff like bikes.
other sentai pillar cape ideas: another tinker or two for the gun/weapon/bikes, capes that offer great incentives to join such as a power booster, healer, thinkers or one with a power that can strengthen the capes or costumes which do exist Chevalier in canon got such a boost to withstand Behemoth's kill aura. Since we know they had Kirin White another option is to say they had a sub team based on the 4 good omens (Kirin, ho-oh, turtle and dragon).