[Katsuki perks up a little bit when Chipp mentions that he's a "killer killer". It's.. kind of like heroism, it sounds like? But maybe more like vigilantism... Heroes don't usually go out of their way to kill criminals, unless they absolutely need to. But Vigilantes absolutely would kill for simply the reason of making sure there's less Villains in the world.

It makes sense, then, why he would let him go and even be kind to him. Though he doesn't know how to feel about being called "some 'lil gay kid"...]

...I ain't a kid, you know. I'm eighteen.

[He knows Chipp's going to call him a kid anyway, though. Most adults do.]

I appreciate the help, though. And that you spared me.

If I had been killed at that moment, I think I would've lost my damn mind when I revived.

[Katsuki's been going through so much lately that a death would've 100% pushed him over the edge...]