User blog comment:Zathronas/Analysis by an author: Volume 2 episode 8: Field Trip/@comment-10390252-20140926134640/@comment-10380701-20140926134958

I think he's just a normal animal. That way, he'll have an aura.

Imagine that instead of having superpower Grimm shit, Zweisheit protects Team RWBY by no selling a Boarbatusk's Spin Attack with his aura.