White killed Brown, but she didn't use any kind of man-made weapon. No, she impaled him with a tongue that came out of her stomach; White isn't human. She's one of the Imposters that they heard about.
Yang finds one of Weiss's magic summoning books and decides to try and summon a demon just for the heck of it. The summoning worked and turns out that is a dragon. You learn something new every day.
Chariot has been looking for the missing Cavendish for years now, but now she thinks she has a lead.