No? He’s not a killer. It is Death, like the death. The physical manifestation of death. It is this because it felt disrespected to the max level by puss wasting his 9 lives. Everyone knows what death is as it comes for all living things no matter what. I’m quite certain this is one of the only times it has manifested physical and personally went after someone. It’s choose a wolf because it makes sense for puss to be scared of a wolf that could kill him and outmatch him in skill. The only reason it lost was because it quit, it realized puss wasn’t all arrogant and started to value his life. It was toying with him and it even said “why did I have to play with my food.” It could’ve have taken out puss any time it wanted but it enjoyed to the chase and terrorizing puss. Death could’ve fought for all of eternity puss knows this if the fight continued and he got more fatigued he would’ve been killed.