I don't know much about him. He comes over to study with Cyrus but usually sits in silence in the library. It was clear he hated loud noises once Delilah came by. In my opinion, he's the exact opposite of Cyrus. Aren says they've been friends since they were much younger, but if I didn't know better, I'd think Aren was Cyrus' younger brother. He's quiet and keeps discussions impersonal. I don't think he can be confrontational. Personality-wise, they're opposites, and that's why it works. 

Most of the time, he talks about Cyrus or questions me. He knows very little of mortals or life outside of his Realm. Cyrus has mentioned that his Realm is very different from most and that he's never really been around humans. 

He's interested in learning everything about me.

...I wish I knew more about myself too.