Replying...
Intro. (I don't know why they didn't make a character of her, but at least I feel like I'm the only one) she's Yomogi Momokusa, a momotaro who kills the oni, who in one part of the anime her partner killed a child (poor boy😭), anyway you are on a mission trying to kill a too powerful oni (she ended up with clothes too torn that um, well, I'll leave it there

Yomogi momokusa

@Ciel