If misasa thinks the guy is alive, he's alive. There's no way an extermination squad member, who is also the fang, would be a big enough amateur to misjudge the damage he caused to someone. His neck didnt break, it just bent badly. Possibly some spinal damage, but misasa is skilled enough to make sure it's not fatal. Unless Monke reveals he has a pretend-to-be-dead move that stops his heart temporarily ala a Baki moment to force a disqualification then slinks off in the shadows grinning after they drag him off, Kengan has this.