5 shadows -> 5 serpents-> 5 personalities = so far we know only 3 ... ╮(￣▽￣)...

Sir Mugo
Lord Mugo
Monster Mugo
God Serpent Mugo
CREEPY MUGO

where do you see five shadows?? the creepy red text comes from sir mugo, you can see his ponytail in the shadow

Look at the windows when the shadows converse between each other. There are 5 windows.

i don’t personally think each window represents one mugo tbh. i guess there could be another hidden secret mugo but having two hidden mugos seem too much, if that were the case at least one of them would’ve spoken by now

There are no two hidden, one is already out, the God Mugo.

There's one left.

On top of omega, its 5 shadows. The last chapter where he is lying down on the bed, and then they are turning in 3 shadows(serpent-like)

I mean it's the first season, maybe the author wants to marinate it for little bit before revealing the major plot twist ╮(￣▽￣)╭ plus for sure we are missing the one more (Main personality) that's combined with the other 3(child,pervert, old man). So far it's sub personality and not the actual "lord/God Mugo"(or whatever we can call him). Plus for dramatic purposes and story line can extra personality...to make it spicy... Anyway it's just speculation for porn manha, no biggy (▰˘◡˘▰)