I really don't know if there's a topic like this, but if there already is then feel free to delete it.
As described in the title, characters that don't look alike, but act alike. I would have to say Ms. Mita from I'm Mita Your Housekeeper
acts like Sebastian Michaelis from Kuroshitsuji
They look nothing alike, obviously, but here are the things they have in common:
They both work as butlers/maids (they count as housekeepers right?)
They both are quiet (Sebastian's a bit more vocal though)
Both are entirely different from other characters
Quite a few people are afraid of them
Both will do anything if you ask.
That's all I have for now :3