My assasin has a ''dark'' and mysterious appearance. Black hair, black eyeshadow, pale skin...i am sure you know what i mean with a dark appearance.
Is there a guy that fits somebody like the one i mentioned here?

Farkas and Vilkas? They can't sneak though.

Jenassa in The Drunken Huntsman seems like she might be a decent fit. Plus she's a follower and is pretty strong.

As for a male, I'm not quite sure. Stenvar maybe, as he is a mercenary. Can't see any others really working well.

Also, I like how dark everything and pale skin means evil.

It's because if you used dark skin to symbolize evil, it'd be "racist".

Ha. But seriously I agree with it making a good looking evil character, it seems most of us think this way because of it being so common in games and movies. Just something you have to laugh at.

Edit: At the guy below this post, it was (very obviously) a joke.

Uhh.. I'm pretty sure nobody believes that. Putting your text in big orange letters doesn't make you right pal.

As for a partner, I think Stenvar would be good. I cant think of anyone else

I thought about Farkas too, he makes quite a good fit for mysterious women

My character is not evil, well at the beginning maybe... but she turned good after the dark brotherhood and thieves guild questline.
She is still really really really mysterious though