His teammates

Jaune went to the training area, collars in hand, and saw Pyrrha and Nora out training.

"Hey, guys!" he waved.

"Hey, Jaune," said Nora. "You here to train?"

"Actually," Jaune said. "I have some collars here that will help you improve your Semblance. Want to try them?"

"Um...sure," Nora said.

"Nora, I'm not so sure about this," Pyrrha said.

"Oh, relax," Nora said as she took a collar. "It'll be fine!"

"Okay," Pyrrha relented and took a collar as well.