User blog comment:Gundam Legilis/Is Cardin smarter than he looks?/@comment-25396609-20150523030754/@comment-25555436-20150523032419

I got a better idea. Cardin is a half-bird faunus, a cardinal faunus. However, he never knew because his mother cut off his wings back when he was a baby because 1) She hated Faunus, and/or 2) The fact Cardin was a half-faunus meant that his husband had cheated on her with another.

And because of this, she hated him, ignored him and when she didn't it wasn't pleasant. Though Cardin never knew why. This is what drove him to bully others. His ego and stuff is just a facade.