[Fortunately, she's not unaccustomed to the same sort of mood or atmosphere. Even when facing her own brother. She doesn't seem phased one way or the other.
Merely sympathetic, still, although she keeps that in check, too. There's no sense in pitying him. She doesn't think that is what he wants.]
You don't have to worry about me. I'm a big girl. I already know the dangers and risks I face with or without Zero.