[quote=@TheWindel]
<Snipped quote by The 42nd Gecko>

Unless he's going for the nightmare symbiote. Forcibly take a host and all that.
[/quote]

Nope! Beast has no malicious intent or side effects like that, other than sucking the life out of you. He's just a sword without a knight. The demon he was made from has no will of its own other than to protect and defend in the most efficient way it can. 

In my own little world (the crazy one in my head) The demon has some tragic backstory where it was in love, and then lost. So it went berserk before being quote unquote killed. Found by magical scientists, rebuilt like robocop, and then made into a weapon of war to be used against its own kind in a battle for the solar system. The protectiveness it had toward its old love subtly bleeds through in its programming as it bonds with its host, in the later stages of the story, confusing the host as its lost love before entering the guardian matrix in overdrive or going berserk again.