Board Thread:General Discussion/@comment-203.104.11.40-20171018233601/@comment-129.1.198.191-20171021062003

That could be the case, but it could also just be the fact that he is a scorpion Faunus, and scorpions can have very deadly venoms. On the other hand, we do know that his aura is bluish since it shows after falling through the roof, which is the color of his eyes when he uses his venom.