Fuu Inubouzaki

A third-year in middle school and the president of the Hero Club. She is the older sister of Itsuki, who she has been looking after following the death of their parents.

She is knowledgeable about Shinju and the Vertex and was the one who gave her fellow members the app needed to fight against the Vertex. She uses a large sword in her hero form and her familiar is Inugami.

As a result of using her Mankai form, she loses vision in her left eye.
(Source: Wikipedia)