One Piece has a lot of sunglasses characters, and people don't take off sunglasses...
There are many legends about the eyes under the sunglasses, so is it really domineering to cover up? Or to hide my own petty ego, or too rubbish a signal...

Be aware of the BIG MOM Pirates' Pokemus
In fact, with sunglasses, is to cover up their own ugly, their own small eyes are really not domineering enough, with sunglasses effect is invisibly much better, it feels a bit like a bounty of hundreds of millions of combatants
If you take off your sunglasses, that identity is even more funny...
The little black eyes are completely out of proportion and so cute...
It is for this reason that many people also run to guess Mingge's eyes
As a result, this matter must have reached the ears of Oda, who also thought it was very funny, so he specially arranged for Luffy to break Mingge's eyes, but even so, he would not show you Mingge's eyes
Directly ignoring the upper half of Mingge's face and not painting, it is too bold!
The more I felt, the more curious I was about the whole picture of Mingge, what did it look like?
The hypnotist praises Gao, the little peach heart eyes, and never takes off the sunglasses
Because it is a manga, there is no way to portray the specific action of taking off the sunglasses, so everyone's image is basically unchanged... Unless it's a very special case!
If there are no special circumstances, don't want to see their eyes in your lifetime!
It's like you don't want to see Kakashi's face!