Why Lady useless and even ruining some moments

Okay, it's gonna be though dialogue, but.... In new anime Lady will make things much complicated. She even ruins some of moments in plot, like when in episode 7 she locked Dante, go to Bunny and does.... Like nothing useful? Killed some bunch of low-tier demons and that's all. And only cause she gets hurt Dante missed a punch from Cavaliery. Like, why netflix made her so dumb? And after all shit they gone through, Lady knockout Dante? Even whe vice-president in face said her that he doesn't give a shit about them?