A thought occurs to me, but thinking further today I've come to the conclusion that Arash being summoned makes absolutely
no sense, so there
must be something strange going on. If the blood worked as a catalyst it would have summoned either a Dragon Slayer like Siegfried, Sigurd, Martha, George, Nezha, Raikou, or Chiyome;
or it would have summoned a Servant who has the Dragon Attribute like Artoria, Mordred, Shuten, Sieg, Elizabeth, or Kiyohime. Any of those should have been summoned, and because they are using the FATE system of Chaldea one being in the area or Singularity
doesn't matter. Regardless Arash is so far down the list of potential Dragon related Servants that he shouldn't be showing up using Wyvern Blood as a catalyst even
if you wanted to inaccurately use the rule of them being already "summoned" disqualifying certain Servants.
And then there's the compatibility Servant Summoning, in which case the Self Sacrificing portion of Taylor should be at best a
mid-level consideration. Even if you do place it as the highest trait then there are better Servants that better exemplify that portion of her history, for example Artoria who discarded her entire identity as a woman to become a King, or Jeanne who by dying stopped a war that was going on for decades. But again that Self Sacrificing part wouldn't be the part of this Taylor which would be the main connection point a Servant would be compatible with, even if it's a factor.
I've said before that Tamamo is by far the singularly most compatible Servant for a Post GM Taylor. But I'll reiterate the reasons why Tamamo is just that.
First in priority of compatibility traits would be the absolute rejection of power, a trait that both have demonstrated. Taylor by letting Contessa shoot her while being Khepri and Tamamo for not becoming a truly horrendous monster, letting herself die after fleeing from the Imperial Court, and never going past a certain point in power to avoid becoming too strong and falling into the temptation to become that monster. The Tamamo Nine are just further vindicaction of this, even if she'd do it to save one of her beloved she would
immediately give up that power. That's the reason why the other 8 even exist, she discarded the power once she used it to accomplish her goal of saving Hakuno and it took on a life of its own,
literally.
Second would be the vilification of their public reputation to the point that they are looked at as the single most evil being of all time and are responsible for more deaths than anyone else combined. Taylor as Khepri is blamed for every single parahuman and human casualty that died in the last part of Gold Morning, and it isn't really fully her fault. Her reputation is utter shit afterwards, and she is at least partially blamed for the death of
Billions. This is pretty much the
exact same thing that Tamamo in the Nasuverse dealt with after her death. Abe-no-Seimei absolutely trashed her reputation and made her to be the singularly most evil being to have ever lived despite never
actually killing anyone. The
only reason that Tamamo
doesn't have the Innocent Monster skill is because she owns up to her extremely bad reputation despite it not actually being true. So that's another thing they have in common.
Third is the desire for love. Taylor at the very deepest heart of who she is just desperately wants to be loved. It's such a blatant thing that gets overshadowed by everything that happens to and around Taylor, but in the end she's just a very lonely girl who desperately wanted to be loved by anyone despite not knowing how to get it. The only reason Tamamo is even a
thing is because she's an aspect of Amaterasu who wanted to understand Humanity and therefore detached a portion of her being to be reborn as a human. At the core of Tamamo is her desire to find and be with someone that can be her beloved spouse. It's why she's only ever summoned by people she
could fall in love with, and Twice is the only example of a person who utterly failed to live up to that potential.
Finally is the self sacrifice part, but again that touches upon the first aspect of compatibility which is why I've got it so far down this list. Taylor gave up everything, starting with her innocence and childhood once she Triggered in the Locker all the way to her giving up her mind to defeat Scion and then giving up her power to avoid becoming another Entity. It's definitely a part of her there's no question about that, but I believe the reasons why matter more than the act itself. Tamamo gave up her divinity, and her identity to become a Human to understand love. When she was forced to flee she gave up her life instead of retaliating because she didn't want to be a monster. So the parallel's between Taylor and Tamamo are incredibly high which should have very much disqualified Arash once again.
Feel free to confirm or deny
@James D. Fawkes, but I sincerely hope that Arash isn't Taylor's permanent Servant and this is once again something weird occurring and messing up Taylor's attempts to summon her most compatible Servant, because him being summoned is beyond
strange.
