Gotta hand it to this other chick, she's got balls.
No survival instincts and a serious lack of threat assessment.
She's mistaken what's important to HER as what's important to Touko. So she may have her weakness, aka her step dad, but Touko doesn't care about the social standing.
She thinks because she can attack she doesn't have anything to defend.
Idiots operate like this.
Edit: Yeeeeep. Called it.