
I am confusion, maybe because I kept skimming through the pages but the demon is the master of the demon whom is their master?

The real master is the kid with dark hair. Her memory was erased by the previous council for going against their policy of pet (demon) battle to the death. And then she was brainwashed to believe that she is a demon pet herself (even though she is actually the magician master).
Her pet which is the roc bird (the guy with light hair) now becomes her pretending 'master' to take care of her.
I'm that person who is energetic and drains people energy out.
But I like the quiet boy more. I just, hate my quirky attitude and I'm more info quiet people
Shittt, totally can relate