Khola

Simply put Khola favors solitude and me-time over pretty much any other aspect of life. He's not one to seek fame nor material or monetary possessions and does well not talking to a cursed soul in months. 
Not necessarily anti-social. Not socially awkward either; in fact he rather is a very welcome presence down in hell, many trying to engage him in conversations or relationships and his remote, almost detached attitude egging them on to lure him out of his withdrawn safe place. Once his interest is piqued he morphs into a surprisingly outgoing, life-of-the-party sort of person - he's just one not to waste energy getting psyched up over minor, to him negligible, things.
Has a really pretty face and intriguing skin, its blue hues peppered with shimmering, scaly parts. When Khola gets upset his scales often puff up a bit - correlating to this, whenever he grows genuinely aggressive or furious his skin will show many more scales than usual, making him appear very snake-esque.
Known to have notorious bedroom eyes.
Khola's contribution to hell's society lies in hellhound training and management. He is not the only trainer assigned to discipline, teach and prepare new hellhounds for their future tasks, mainly centering around dragging those souls unwilling to hell. He's an absolute genius in his field however and spends more of his time around the diabolical beasts than around other demons. Very gentle towards the hounds out of training. Often seen playing or cuddling them, sometimes even napping among his personal army of canine fans.
Khola is the one called for extra-hellish emergencies concerning hellhounds as well.

Would rather die a second time than admit he hums and sometimes quietly sings to himself when he's alone with the hounds. Has a beautiful vouce though.

Eventually to become the lead singer of Voul's band.

✽ UNIVERSE RELATIONSHIPS ✽

Voul
Prays to his Lord and Savior the Devil to keep this guy as far away from his as in any way possible. Already too insincere with himself about his passion for song, the fact that Voul has caught him singing once is a fact he'd prefer out of this world and the other. Irritated, and a little embarrassed, Khola handles meetings with the eccentric demon. He tries his best to brush Voul off, gross him out or just plainly be enough of a cold-shouldered dick to annoy him out of his way but fails miserably in the face of Voul's unending persistence.
Really hates the sparkle to Voul's eyes whenever he talks to him.
(Is secretly playing with the thought of giving Voul's offers a try every now and then though.)

Atil
A very special case in Khola's book. Disliking Atil's almost regular visits to his training grounds by his introvert surface nature he did never really warm up to the chilling demon, especially given the lectures Atil attempts to give him now and then. However the first time he witnessed the insane amount of instantaneous trust and affection his usually bloodthirsty hellhounds showered Atil with and his equal reaction to them twisted Khola's thoughts on him quite a bit. He can't help but associate Atil's presence with his beloved beasts now and thus started feeling the same kind of adoring giddiness towards the other demon. Would pet Atil's head or tickle his stomach or chin if it wasn't for his self-control. To Khola he's just a giant, buff puppy that walks on two legs instead of four (or more).