Aaron L. Goosby/Ya

Ya is a Thought Projection and one of the Top Two Wives (Romaji: Nikyouseishitsu, Kanji: 二強正室).

Unlike the Seven Concubines, she is not representative of any of Aaron's emotions. Instead she is naught but a tool whose sole purpose for existing is serve Aaron as an enforcer of sorts.

It should be noted that Ya is rarely seen due to the fact that she takes a lot more magical power to conjure than any of Aaron's other Thought Projections.

Personality
Unlike the Seven Concubines and Kyuu, Ya has no personality. She merely does as she is told to do by Aaron. That is all.

Aaron L. Goosby
She follows his orders. Period.

Master Swordswoman
Amongst Aaron, the Seven Concubines, and Kyuu; Ya's mastery of the sword is unparalleled. Even on the broader spectrum of the entirety of Fiore, there are indeed few that can even hope to match Ya stroke for stroke.

Master Hand-to-Hand Combatant
Much like Aaron, Ya can utilize scholastic wrestling to manhandle and individual with ease. But unlike Aaron, Ya doesn't need Swoll to do so.

Annihilation Magic
Unlike Aaron and Ichi, Ya utilizes Annihilation Magic as her forte. Because of her lack of personality, she is fully capable of utilizing Archive to analyze a magic to the point where she can discern the structure of its eternano arrangement and as a result become capable of casting an anti-magic for it. It should also be noted that Ya can apply her Annihilation Magic as Sword Magic in a manner that is by far superior to how Ichi does it.