"Yeah, I know the spell," Chas replied instantly. She'd memorized it early on though she hadn't once tried to use it. Standing on the grass, she looked up at him, raising an eyebrow. "Right now? If I do the spell correctly, I'll change into my animagus form?" In which she'd be completely animal. She suddenly realized just how much trust she was putting in T. Sure, she was sure as an animal she'd probably be able to defend herself physically, but not from magic. If T had been someone she didn't trust, he could have taken advantage of her vulnerable state. She eyed T for a moment, fingering her wand, but she did trust him, so she didn't really feel worried.