I'm a soldier in the military, so yes. Sometimes I kill.

[He spreads out the fingers on his left hand so she can see the numbers] You see this? It's the date of when I took my first life. I was a little older than you, seventeen. The guy had a knife in my face, so I fought back. I used my powers and killed him. I don't regret doing it.

Using your powers like that, to defend yourself and the people you care about, that's a good thing. Back home, I was teaching people like us, so if you ever need someone to practice with, just let me know, okay?