Tachibana Kaju

The long lost osananajimi (maybe) that has amnesia. Self-proclaimed “reliable oneesan” of the family but despite the long silky black hair she is a natural klutz. Favorite items being healthy foods, there are times when the dorm’s kitchen may have seen better days. In a few words: slow, my pace, and assets.

Spoiler

Her real identity is Tachibana Fuwari (橘 ふわり). Having lost her memory, she only remembered the name of "Kaju" and the role of "onee-chan" and she rebuilt her personality with these elements.