Aaron L. Goosby/Nana

Nana is a Thought Projection and one of the Seven Concubines (Romaji: Shichisokushitsu, Kanji: 七側室).

She is representative of Aaron's dismissal and disgust and as a result she serves as his spokeswoman whenever he is in such a mood.

Personality
Contrary to popular belief, the Seven Concubines aren't just manifestations of Aaron's personality. They're also individuals in their own right and as a result of such each of them have a personality of their own.

Whenever she isn't serving as Aaron's spokeswoman, Nana is the pious sort. Much to Aaron's chagrin, she devotes herself to worshipping Aaron due to the fact that she sees it to be fit for a creation to worship the creator. Unfortunately it's quite difficult for Aaron to wholeheartedly disagree with her since he is the religious sort as well and worships his own God...

Relationship
While Aaron and Ichi may have a master-servant relationship, neither of them have ever bothered to think of it as that. But Nana on the other hand directly sees herself as a servant of Aaron. And she is the only one of the Seven Concubines to do so.

Unison Raid
Nana is Aaron's go-to concubine for the Unison Raid (Romaji: Yunizon Reido, Kanji: 合体魔法, ユニゾンレイド). Unlike most practitioners of Unison Raid, Nana is capable of serving as a medium for the casting of a Unison Raid amongst just about any number of mages.

Only her presence upon the battlefield will allow Aaron and the other six of the Seven Concubines to take Wŭ Xíng Magic to its full potential.