I guess the writer decided to formally throw subtlety out the window-
Wait... her name is Arse, and she's one of the D-Devil's fanatics...
Oh God, does this make her the Booty Warrior?
Hey, Giselle was all kinds of insufferable starting out (basically a female Bakugo in my opinion), but once Cross got his training, she mellowed out. Sylphy is likely to be in the same boat.