> I'd at least like a PM to judge if it makes sense or not.

Well, I may as well put hat I had in mind. In truth, I kinda wanted to refine the idea before posting it up.

Essentially, the Chaos God Malal managed to send Bjorn to the Multiverse for the purpose of causing anarchy. Specifically because I was planning on introducing a Chaos worshipper at some point down the line. Malal is a rogue Chaos God who wants to destroy the others, so, naturally, he chose to pluck up a being that has defeated a Daemon Primarch. 

>I am still somewhat surprised that neither of you had a comment regarding my intention to play a Gue'vesa, honestly.

Sorry, I didn't actually see this.

Anyway, I think it could work as an interesting character play, Bjorn is probably gonna let you live, if for no other reason than because it's a human face from his own universe, and at least knows that, as a member of the Tau empire, will probably play ball, at least until they get home. Just know that he may take a couple of pot-shots at your character, and have little regard for his safety. That's just Bjorns character.