I think this dude is the mc in disguise? Or perhaps mc has already spoken to this guy and he's in on it.
But without this new guy as an antagonist the story does become rather... boring so it would be best to have him be antagonistic instead of on the mc's side. Someone who can at least potentially match mc's power would be very valuable as a plot device. Torture and chaos against fodder is nice and all but a nice battle between stronk peepo would be cool. Well, considering the short length of chapters maybe that's not such a good idea lol