I am sure he was prepared to do whatever he had to do, that dude had a hard life. It just seems fake when he was the entire impetus not only behind Nothing's escape, but him regaining his crown. Within moments it went from Yarvi basically winning the throne back for him and kneeling before him/acknowledging his claim to the throne to "I guess we have to kill him now because someone said words".
I'm probably making a bigger deal than it is, the whole "SURPRISE MOTHERFUCKER!" that Nothing pulled at the end felt pretty lame to me, and I really didn't like it, so when right after that they are debating Yarvi's execution after all of the shit that came before, I just couldn't buy it.