Beast version of Crowley in Supernatural, as in he's sometimes their ally, sometimes their enemy, but always a psychopath, who always has questionable intentions (even when he helps them).

(Ex. Grindelwald: I'm going to be over to kill you on Tuesday.

Graves: That's good. I'm not doing anything Tuesday.

Grindelwald:...you sound different. You sound like you've been through a ringer.

Graves: A little.

Grindelwald: I...you know, Tuesday doesn't really work for me. Can I get back to you?

Graves: Sure...I'll be right here.

Grindelwald: I know.)