Sex, drugs, rock n roll, and fucking "A" anarchy... that's what drew Cyrus into the Heavy Metal business years ago. His band, the No Screaming Eagleshits, was doing well and a real record deal was just a few gigs around the corner. Unfortunately Cyrus got involved with a dark haired groupie chick called Molly who was (among other quirks) into the occult and some other weird shit...but she was so damn hot who cared? Cyrus participated in some silly rituals with her fucking so-called coven in the pursuit of getting laid.
As it turned out though, her coven wasn't the bunch of fucking morons Cyrus took them for...they were messing around with real shit. Too bad for Cyrus the head of the coven, Bryan, also wanted to tap Molly's ass and wanted Cyrus out of the picture in a big way. Bryan invited Cyrus over to try some new drugs, which turned out to be a roofie. Cyrus woke up strapped to the covens altar in the basement with a pentagram carved into his chest with a box cutter, and Bryan reciting from a grimoire at the head of the altar.
The next few years are very hazy for Cyrus as he was fully possessed and controlled by a daemon known as Draimaniel. However against all odds Cyrus, who had always had a very strong personality, managed to overcome Draimaniel and cage the daemon within himself, Bound to his own will.
The next few days were ugly, as Cyrus took revenge on Bryan and the coven for his mistreatment. Fortunately the coven had been Sanctioned due to their growing Occult depredations, and there were no repercussions for his rather creative and graphic vengeance. Cyrus even got to collect the modest Bounties in the aftermath, which got him back on his feet. A couple of Fed agents handling the case took a little pity on Cyrus and schooled him up on the realities of the Supernatural world and the trade of Hunting, logged his existence, and made sure he understood that as a Supernatural person what he was and was not allowed to do.
Cyrus adapted to his new state, and was matured quite a bit by his ordeal and the long internal struggle to win control of his life back, and developed a new lease on life. Now he actively crusades against powers of darkness, particularly cults and daemonic things. He feels compelled to prevent what happened to him from happening to others.
Cyrus's voice can harm and weaken others; he can just wail, scream, or holler, belt out actual songs, or just talk...as he prefers. He is also much stronger and durable than his appearance would suggest.
However, even though he's mostly in control, he is technically possesed by a daemon and there is the possibility that Draimaniel can influence or even out right take over Cyrus's decision making faculties. Cyrus must remain ever vigilant.