[Leslie also hopes it’s an animal, but Mikasa doesn’t sound very confident in that possibility.]

I mostly have studied abj — [...do non-witches know what the schools mean? Instead, Leslie counts off on her fingers.] Um, I can heal a little, and make barriers, and I can make things a little stronger, and some things with ice.

[And some other things, but she is guessing that Mikasa is asking about things that can be done if they’re in danger specifically.]