Meh. I don't know why she does it but it seemed to fair pretty well v. Natsuki in the first battle.
Other than that, she has done non-circle attacks! Like the one in 14, where she goes charging out of the gate with her sword trailing in a - straight - line behind her.
Other than that, she has done non-circle attacks! Like the one in 14, where she goes charging out of the gate with her sword trailing in a - straight - line behind her.