"...Mm." That's the only response Rose gives to Bones' explanation. He absolutely makes a good point, and she certainly agrees that he probably should've let people know what he was doing- but agreeing out loud and chastising Casey would just seem too hypocritical, given her own actions.

"To be honest, he... may have fared better without me there. I don't exactly have the best control of my magic, and, well. Some of his injuries may have been a result of some unintended friendly fire." A moment passes, as Rose tries to give an awkward chuckle. "Or, all of them. Ehehe..."