Carmine (my character) is a somewhat, mentally unstable Hunter model Android. since he was designed to kill, it's all he really knows, he doesn't know any better, he was designed to shoot first, and ask questions later, if at all. And he has a nasty run in with strangers always wanting to dismantle him so he's overly jumpy.
So it was Chrono's presence, but he's just a nervous 16 year old android with a fully automatic assault rifle, stuck in the middle of Armageddon.