Okay here me out
What if 'sir' Mugo is the dangerous one. He just gives me bad vibes. The second Mugo is obviously dubious, but with how much time he spends with the MC, there'll be a change of character. The third one who almost ate the MC later turned out to be okay. Even nice enough to game with the MC. I know they called the third one a monster, but something doesn't sit right with me about the first one...(づ ̄ ³ ̄)づ
This is what I think too! Jerk/Horny Mugo is the one spending the most time with the MC, the only one that’s had sex with him so far, and also on the cover of the manhwa, so I think he’s the endgame and the one that will fall truly in love with him! He’s the red flag that will turn into the biggest puppy green flag simp for the MC. But the one we think is the green flag, is not, meaning sir Mugo, I mean … if he’s the “original” inhabitant of that body, all the sacrifices are for him because he’s wanted them, that’s not really a good man
Another reason why I don't trust Sir Mugo is the art. Here me out. The MC and Jerk Mugo mirror Beom and Dowon in full volume, (and I understand that it's the same artist), but Sir Mugo doesn't mirror that. He looks like Mr Kwon in full volume especially when he smiled in chap. 2. You may think I'm reaching but I find him VERY suspicious
I think the MC is so alike Taeju Bear that I have difficulties differentiating them, that’s why I haven’t learned his name yet so I don’t agree that he looks like Beom I can see the similarities between Jerk Mugo and Dowon! I don’t remember what Mr. Kwon looked like BUT in Full Volume Beom thought he was the good guy and he wasn’t, and now omega Taeju thinks sir Mugo is good, but maybe he’s not ….
Alr theory time
The 4th "Mugo" is the "divinity" of the three personalities.
We saw a similar figure in the big jar, with asshole mugo being the one it interacted with first. It could be that Asshole mugo is actually the real person of the three, which would be the reason why he's the one with the most time taking control of their body.