Basically every other character I've ever played would have immediately done one of the following.
1. Killed Cornelius.
2. Beat the unholy shit out of Cornelius, without killing him.
3. Immediately proved their own absurd advantage in power over Cornelius, and then mocking him.
Nirvinia is very much the black sheep of the family when it comes to pillars(who, given that she refers to humans as Sun Tribe, I'll think will soon be called Moon Tribe).
-STATS
Strength: A+. Under normal circumstances Arcueid is fifty times stronger than the average human being of ideal physical fitness. At night this is doubled.
Endurance: B. Disregarding her other abilities, Arcueid can withstand forty times the amount of damage to her body before it begins to fail compared to the average human.
Agility: A. In both speed and reaction time, Arcueid possess a fifty times the capability of the average human.
Mana: B. Arcueid's magical capacity and her skill in channeling it are forty times that of the average magus.
Luck: C. Arcueid's ability to defy fate, and her general fortune, is thirty times greater than the average human.
-Regression Quality: As a True Ancestor, Arcueid does not technically possess Magic Circuits, or at least not what magi think of when using the term. The equivalent structures are known as Regression to The Age of Gods, and they represent the extent that which the possessor is capable of producing Mysteries that existed on Earth before Magic. Their Quality ranking represents "how distant from what humans are capable of" when reproducing their pure Mysteries. Their Quantity ranking represents power, the higher the quantity, the greater the degree of influence over the surrounding environment. Their composition represents the era of the "Mystery" they date to. While identical in Quality and Composition to the original Arcueid, the Quantity has dropped.
-Quality: B
-Quantity: B
-Composition: Before Common Era, pseudo-deified natural phenomenon
-Enhanced Senses: Senses in general are unquestionably superior to that of humans.
Enhanced Sight: Arcueid is easily capable of seeing in near complete darkness with no drop in quality of vision.
Enhanced Hearing: Arcueid can hear and identify a single individual's heartbeat on a city street, overhear an individual conversation between individuals on the other side of a crowded room, and other such auditory feats.
-Regeneration: While still capable of blatantly supernatural healing, the capacity to recover from wounds is reduced compared to the original. Totally lost limbs and organs can be regenerated within a few minutes, major wounds that do not meaningfully impact the structure of the body shortly revert to pristine condition after being received, and minor wounds don't exist for practical purposes. Stops bleeding nigh-instantaneously. The brain however, is still vital, and if it is destroyed or the head is separated from the body, death will follow. In addition, if structural integrity is compromised, she will have to accept finishing blows.
-Conceptual Adaptation: The original Arcueid's most potent defense... has been scaled down massively, but even still, has a large effect in prolonged battles. Whereas the original was immune to all mundane weapons and able to adapt an immunity to any magecraft system or conceptual attack on first experiencing it, both the depth and speed of adaptation has been reduced. Anything she is hit with and survives will have a lower efficiency each subsequent time that effect is experienced until full immunity is achieved. In technical terms, gains E-D-C-B-A-EX ranks resistance every time a spell/effect is used against her, and each time she survives getting hit with it, the resistance rises by one rank. Currently has no resistance to any particular effect.
-Mystic Eyes of Enchantment: The type of Mystic Eye possessed by most vampires, this is a potent hypnotic gaze. When active, her irises turn Goldand she is able to implant powerful compulsions and illusions in those looking into her eyes. Ranked at A. Like many mental effects, it is possible to resist with a sufficient Mana statistic, special abilities protecting the mind, or by running prana through ones Circuits.
-Claws: Capable of shifting hands into claws. Supernaturally strong and sharp, they are potent weapons, though they have no special effect beyond being natural weapons in close combat. Able to withstand blows against the weapons of some Servants.
-Marble Phantasm: The greatest power possessed by True Ancestors. The ability of elementals to manifest any naturally occurring effect. The ability to connect ones will to nature, to interfere on probabilities, and to transfigure the surrounding world at will according to their vision of the world. As the user is a part of nature, he or she can change the world as desired, but in the end, what an elemental can act on is only something within the scope of nature. The capacity of the actualization is proportional to the scale of the elemental. Thus, as this Arcueid is lesser in scale to the original, the power of the ability has decreased. Cannot be used on humans, human spirits, and their creations directly, as those are considered to be independent from nature. Controlling animals however, is possible. As a general rule, Marble Phantasm in combat is mostly limited to simple effects. More complicated tasks work on a case by case basis, and are not something that can be done with casual effort. Potential effects are as follows;
--Creation and control of non-magical, but extremely high quality objects. In other words, the thing Arc does with chains every now and again. Given that said chains are strong enough to damage and bind herself, it can be assumed they're hella tough. Even at the level Servants operate at.
--Direct manipulation of natural things. Animals, plants, minerals unrefined by humans, maybe Phantasmal beasts? Probably not that last one.
--Elemental attacks. Manipulation of the atmosphere, Earth, liquids, generating heat out of nowhere.... you name. Cannot be manifested directly on top of an enemy because [MAGIBABBLE].
--Weather manipulation
--Creation of 'spiritual realms' akin to bounded fields. While said realms are not able to defy the rules of nature, they can be a base or advantageous terrain. Similar to a pocket dimension. As they are not separate from the world, they cannot be completely cut off, and thus it is possible to stray into them by accident. May or may not be able to manifest Millennium Castle Brunestud.
--Teleportation? Sumire of the 27DAA is supposedly able to achieve the effect via Marble Phantasm.
-Reputation: As the original Arcueid comes from the Nasuverse, basically everyone knows who she is, what her powers are, and if opposition comes, it will be overwhelming. If the nerfs come to light, everyone and their dog from the upper tiers will want to take a bite out of her. In general, social situations have innately different options from most other players.
Personality: Whimsical and 'almost' childlike, Arcueid has next to no experience with or knowledge of how to interact with others, and while she has a basic knowledge of the modern era she doesn't have much of a grasp of such pointless matters as 'social norms'. If there was one thing she fears, it would be giving into her Vampiric Impulses and becoming the same kind of monster she was made to slay. The fact that she was made to kill renegade True Ancestors and the most powerful of Dead Apostles has left her with very little hesitation towards the act of killing, though it's not her first method of solving problems that exist outside her initial purpose. It is worthy of note that she is rather fond of cinema in general and a certain Carnival.
Nirvinia: "Exposition explanation unknown terms theorizing long speech how do you like your walls of text were you taking notes this will be on the test I am not even done that was just the first goddamn question."
Saber of Black: "-I truly believed that you were nothing more than a withdrawn, pompous, fool with no concept of pleasure, but on this day, with you bringing back this specimen... I am proud of you."
Cornelius: 'Why didn't she attack why didn't she attack what did I say wrong what would have made her attack?!'
Nirvinia: 'I am beginning to wonder where I can acquire human clothing.'