Atil

His rugged, eerie appearance is no joke.
Atil, as a demon working for the Demon Assassination Force (DAF), one of the sections directly under and controlled by the Devil that busies itself with demons gone rogue, genuinely benevolent or unwilling to do their job for hell properly for one reason or another, harbors a rather gruff, very straight forward (in-your-face) kind of persona. Smiles are like the eigth wonder of the world with him unless they are provocations or through aggressive thrill.
Many demons fear him for his (kind of) resting bitch face. His piercing, sharp eyes are rumored to have killed a guy for the second time and never smile or generally change with the rest of his features. 
Atil's physical strength and agility aren't to be taken lightly either. Being one of the many demons responsible for dragging the poor bastards that are acting out back down to hell he puts great value on a healthy, fit physique. Not to mention that his line of work is not exactly known for being very gentle or forgiving - a suspect demon may get erradicated in the process, it happens - and if they survive, once back in hell they will be 'reset', as the Devil so graciously labels it, either way. This has lead Atil to a dulled view and feel towards many gruesome things happening in hell. Is perceived as a stone-hearted man but can actually show grand care.
His blood is infused with actual gold that can be seen in his horns and fingers.
Quite proud of his body and physical abilities.
Loves anything golden and will shank a bitch if anything happens to his precious hair.
Atil's mask was a gift by the Devil himself back in his trainee days when he broke his jaw during a violent riot simulation. It was originally meant to help support and reduce the pressure on his healing bones but Atil kept it after it had become a sort of trademark for him among his colleagues. 
(Plus he secretly thinks it makes him look super cool and intimidating times ten.)
Tends to take the 'responsibility' that comes with his job a little too seriously and too far. A tad governing and dominant towards others.

Eventually to become the drummer of Voul's band.

✽ UNIVERSE RELATIONSHIPS ✽

Voul
In no way does Atil appreciate anything related to this particular demon.
To him Voul is a lazy, irresponsible, childish blemish on the image that is a demon with escapist issues and an attitude the size of purgatory.
Times he stopped counting Atil clashed with Voul in terms of morals, views and values so crassly he nearly beat up his sorry ass and he wishes for nothing more than to see his name on the assassination list one day so he can teach him a lesson.
When these two meet, trouble is sure to follow. They can't stand each other for the second life of them.

Khola
Atil views him simply as a colleague much like he does those working with him in the department of the DAF. Anyone doing proper business for the Devil is a good demon in his book. At times he would drop by to 'chitchat' with Khola as he is wont to do with anybody working closely under his Majesty, although he would rather observe and critique Khola's abilities rather than 'chitchat', really. Having the strange idea that it's in his responsibility to supervise colleagues, Atil doesn't mince matters with him either. He recognizes Khola's skill in his field however and thus harbors respect for the trainer.
Khola's enthralling offish demeanor does not affect Atil at all, perhaps only in a passive, kind of sneaky way which Atil is blind to.