Well he is going to have problems now ... Can't imagine how he is going to get through this while keeping that girl alive. Though he really should fight these things using his suit's power, and not the gun.
The cops dealt some damage but they got killed just as quickly anyway. Kurono saved that girl but the monster immediately followed them to where they are. It'll be an intense fight that requires the perfect balance between offense and defense in addition to not having her see the final blow no matter what.
The resemblance to Frieza is uncanny now that it came to mind!
I can't help but imagine the twist if Kei was framed cause the police couldn't see that monster when it "transformed" in the classroom, man it's been such a while since I've been this engaged in a manga