@codydub03 all hail the built in passive "MC charm ability", no one other then the bad guys and stupid people can hate the MC.
@Jinzed
people underestimate how powerfull a tame spell really is from a narative point of wiev, but it would come down to how the tame spell work.
if the spell can enslave a monster without the need to weaken it regardless of power, then any monster would be fair game.
but most of the time the tame spell and the like usually requires the caster to be more powerful, the target to be willing to be tamed, some ritual or something for it to work.
but if we assume he cant just shrug it off by being powerful as heck and not having any type of magic immunity, then yeah it would work on him like any other monster.
i dont think there is a tame spell in the Rimuru universe, but if there was its likely requires the monster to be weaker than the caster and would fail as i cant see Rimuru being that much weaker.
Even if our MC here is powerful beyond belief.
something not alot of stories consider is that tamed monster also seem to understand human speech to some extent after being taimed, so it could also work as a translation spell for monster, not that Rimuru needs it.