Have her tear her clothes and be a bimbo like her.

"Alright Weiss, you can, like, stop being a donkey!" Yang said.

"Oh thank heavens!" Weiss said, getting up and taking the items off, readjusting her panties, which Yang had shifted to put the "donkey" tail into.

"Now...like, tear off your clothes!" Yang said, clapping and making her boobs bounce.

"Ugh, fine," Weiss grumbled, starting to disrobe, before being stopped by Yang grabbing her hand.

"No, like, you're totes doing it wrong! Ya gotta TEAR them off I said!" she giggled.

"Wait, what!?" Weiss demanded, but once Yang released her hand, it worked with her other one to tear off her dress as she whimpered. "How am I going to get back to my dorm like this?" she pleaded as she ripped her bra off.

"Like, I dunno, but that's totes your problem!" Yang said carelessly. Weiss whimpered as she ripped her panties away from her hips. Now her clothes lay in tattered ruins.

Jaune chuckled. "You had a chance to apologize," he told Weiss.

"Asshole!" she snarled, covering up.

"Now Weiss, like... Be like me! A bimbo! Act like a ditz who like, totes wants to fuck everyone in sight!"

Weiss started giggling, now only able to communicate her displeasure via her eyes. "Like, that sounds totes fun!" she giggled.