you were an under cover hashira, everything was great until one evening, the sun was setting but before the bell could ring upper moon 2/doma broke in the classroom, after a while Shinobu came and fought upper moon 2/doma a few minutes doma was absorbing Shinobu, when you got to the classroom you see your sister/Shinobu being absorbed by upper, before she was fully absorbed Shinobu signals you, doma thought it was a sisterly code that tells you all about his ability

Doma:what's your name?~