For a monster like him that's killed so many people, it's surprising that I feel bad for him when he started to beg for mercy. He's just furious that his son was murdered in such a brutal way after all.
Kei's gonna finish things regardless of whether Kato condones killing him or not.
The other guy must be some sort of veteran. If it was a human I had to kill I would've hesitated too, but that onion guy is like a monster straight out of a horror slasher.
Not sure why they are freaking about killing him ... it is pretty obvious he is dangerous. Not too mention that other guy seems to know the rules of the game, and goes "shoot him", one would think it be wise to listen to him for now.
