
Glasses mugo loves sweets and is very kind. He is most likely the original mugo.
Monster mugo loves meat and videos games.
He is most likely the youngest mugo.
And jerk mugo is the one who is around the most. He really enjoys s*x. I think because he is scared of small spaces that is the reason why he doesn't like being trapped in their mind for too long, and why he is always out.
I hope this helps!

Old mugo/glasses mugo - sussy, has sweet tooth
Monster mugo - hungry mugo, likes (human) meat but got satiated with sex, occupied body to take sacrifices, likes games
Mean mugo - tsundere, claustrophobic, sex maniac, territorial, usually occupies body
There are three identities in one body (I mean, u kno how multiple personalities work right) and there’s a possibility they might merge (mentioned a few chapters ago)
Can someone make me understand those 3 mogu sir in baby language to me? TT