He's also a giant teddy bear, prone to protecting himself and those around him and forgetting how strong he is with alarming regularity.
That's Ox, in a nutshell. That also describes me to a certain extent, and quite a few of my close friends. I can relate to the big guy. Not trying to be scary but is, can't help but look mad all the time. I get it. It's just a family trait.
Here's what the book tells us on Ox: