The Grand OC SII: The Re-OCening: Week 29: UNINTELLIGIBLE!

Username: Dragon Fogel
Name: Drey Gan-f O'Gall
Race: Demonic Extradimensional Entity
Gender: Beyond definition; allows lesser beings to use 'he'
Text Color: This one, for reasons

Biography:
"You will tell me all you know."
Drey growled, and futilely clawed against the edges of the pentagram. He'd gotten careless, and he knew it.
Any other world's bindings would have fallen apart by now under his power. But no, he had to show off. Had to march right into the guild that was still hunting him to grab their promising new prospect.
Not that he regretted the plan, of course. It would have been well worth the risk if he'd succeeded. What he was upset about was underestimating old Griv.
Of course she'd known he'd come back. Of course she'd been ready. The latest prodigy had been bait, and he'd walked right into the trap.
"I was contacted by an entity of great power," Drey said, when he couldn't hold off the command any longer. "I was to select a champion for a contest. A battle to the death, across worlds. If my champion won, I would be richly rewarded."
Griv scowled.
"You're withholding details."
And it was more than a little painful to do so. But Drey was determined to resist as much as he could.
"What does it matter to you?"
"It doesn't matter to her," said the young prodigy. "But as your master, I find myself quite interested in what this reward is. Tell me how to contact this being."
That was the greatest humiliation in all this. It would be one thing if Griv bound him; she was the Archmagus, after all. But no, the youngster, with less than a year of formal training, had done the deed. Griv was interrogating him, but it was the youth's orders forcing him to answer.
He could only watch on in disgust as this child declared him "my champion in your contest".
And the host, much to Drey's annoyance, agreed.

Description:
Drey looks like a fairly typical demon. Ugly face, large wings, an aura of evil energy surrounding him.
Drey dislikes pretty much everyone and everything, but especially mages of all varieties. This was before he was bound to one and entered in a battle he had previously been looking forward to watching for bloodsport.
He'd be perfectly happy to vent his frustrations by killing everyone and everything regardless, except that he doesn't really have a choice in the matter.

Weapons and Abilities:
While Drey has access to dimensional travel and a few other extremely powerful abilities, the apprentice currently binding him has ordered him not to use any of his extradimensional powers. He's limited to what he could do as an ordinary demon, before he escaped his world's boundaries.
That's still potent - he can fly, control dark energies, and tempt mortals - but there's another condition.
He's not allowed to harm innocents, even indirectly. If this happens, he suffers intense pain from the binding spell, proportional to the harm he caused. If he willfully kills even innocent, the feedback would be enough to destroy him.
Drey is not happy about this arrangement, to say the least.