Can my main character be unrelatable and unreadable while still being popular?

I’m trying to develop my Demon Slayer character in his story, and for some reason. I don’t exactly like the idea of the audience/watcher/reader trying to instantly connect with my main character. Even before this hit me, I gave my character plenty of traits and items that prevents him from just being an easy relatable and readable person.

Ex. A mask to cover his whole entire face. He doesn’t use any body language, and he’s very stoic. That’s just a few examples though.

So back to the original point/question, can a character be unrelatable and unreadable wow being popular and well received at the same time?