Not much is known about Aki, due to her small role compared to that of her male counterpart, Yuu Kannagi.
Aki makes her very short first appearance in God Eater: The Spiral Fate, which isn't canonical to the main series. She reappeared in God Eater -the 2nd break-, which is one of the canonical manga to the main series.
Aki act as the same way as Yuu Kannagi in the game.
Her actual personality has yet to be revealed.
Aki is a teenage girl with fiery red hair styled in a ponytail with braids and green eyes. She wears a green Fenrir formal uniform with a black shirt under the jacket, a black glove in her left hand, black shorts, and green boots with black knee highs.
- An early artwork of God Eater featured Aki as the original wielder of the Voltaic Blade God Arc, before Ryo Kagami used it. Her Arc was later changed to Blade EX.
- There are a few artworks that feature Yuu and Aki at the same time, proving her existence is canon.
- In Japanese, Aki means "autumn" or "bright".
- Her Japanese default voice in God Eater Burst and God Eater Resurrection is Satomi Satō, which is also her official Japanese voice actress, confirmed in Pachi-Slot God Eater.