Brynjar, from Hel
"Today is a good day for you to die!"
An Asgardian who was an unparalled warrior, he walked away from a fight he didn't believe and was killed by an arrow in the back. Because of his dishonorable death, he was sent to Hel, where he has spendt centuries killing and crippling every soul and/or monster he came across. Emboldened and made powerful by centuries of slaughter, Hela looks upon him as a weapon to be pointed and unleashing, having once even turned him loose upon Thor.
But Brynjar has plans of his own. If he must be in Hel, then it will be a Hel of his own making. Hela's obsession with Asgard and the souls of the Aesthir has blinded her to the warrior souls upon Earth. He plots to unleash Hel upon Earth with the power of the Evil Eye and reap the souls of the mightiest of mortal warriors before other hands can claim them.
Markos, from Hades
"I swear by all that is unholy, I will kill you if you do not shut up!"
A demonic centaur, Markos has served as one of Pluto's minions for ages, all the while quietly seething with rage and wishing to dethrone him. No one knows the cause of his hate, or even what his overall goals are, only that he agreed to take part in this venture. Nominally quiet and stoic, he's also the type who would kill to make a point, he'd kill to silence a nattering voice, he'd kill just to get a reaction out of someone, he'd kill for no other reason than because he could.
Markos firmly believes that there is no kill like overkill, and prefers to make an example to cow others into submission. He gets on well enough with Brynjar, for both revel in violence, and he actually frightens Eligos and Rakkor a bit. But with his motives unknown, he may be one of the most dangerous of them all.
Eligos, from Mephisto's realm
"I took down the entire United States cellular service for half an hour today. Lots of very cranky people."
Eligos is the most cultured, affable demon you're bound to meet. Don't mistake that for weakness, though. He's as shrewd a creature as ever walked the Infernal Realms. He simply recognizes that for all the tortures and torments Hell is capable of devising, for all the craftiness of demonkind... humans are so much better at torturing themselves and screwing themselves over. He once examined a cellular phone contract and sent it to the division of his Hell in charge of writing the soul contracts with an effort to "Learn, guys."
Rather than overly try to collect souls or meddle in the affairs of heroes or anything like that, he prefers to study the ways of humans and nudge them in more subtle ways. A billion slightly tarnished souls yields more overall negative karma than one fully corrupted one, after all. His calm and cultured demeanor leads to him getting on quite well with Rakkor, but puts him at odds with some of the more violent members of the hand. Should things go south, he'll be most likely to be the first to cut his losses and run.
Rakkor, from Satanish's realm
"KILL YOU, KILL YOU ALL! I... I'm sorry, that was the old me. I'm trying not to do that anymore."
Much as Mephisto formed Blackheart from accumulated hostile energy, so did Satanish form Rakkor from the souls slain by his cult, the Sons of Satanish. At first, Rakkor delighted in the torture and torment he unleashed, following in the footsteps of his father. Until slowly, he began to see how ultimately self destructive his "father"'s methods were, both in terms of acquiring souls and to the damned under his dominion. He taught himself self-control, realizing there had to be a better way.
Rakkor tries to comport himself with poise and dignity, focusing on the art of the deal of acquiring souls and followers. Though his every impulse demands he lash out at even the slightest provocation, he resists these, telling himself he must make the smart choice. He is seductively silver-tongued, and will honor his agreements, but will always make sure he comes out on top.
Diaboli Manumi , from Marduk Kurios's Hell
"You're all going to get me killed, I just know it."
Diaboli Manumi thinks Markos and Brynjar are colossal idiots incapable of understanding long term planning or subtly. Meanwhile, Rakkor and Eligos are lacking in spine and substance, to busy plotting and working the light-handed game to know sometimes you needed to strike decisively. As one of Marduk Kurios's most trusted lieutenants (in as much as the politics of Hell allow for trust), she's been the only one to point out how poorly things turned out for the last Six-Fingered Hand.
Still, the promise of power is a tempting one, and she wouldn't have risen to be the devil she was without an opportunistic and backstabbing streak. She's clever and learned, and more than a little skilled in the temptations of mortals and other demons, especially men. If things start to go south for them, though, she'll be the first to bail and call in Marduk Kurious, selling the others out to save her own skin.
C'laris, of Limbo
"What is it? Can I kill it?"
C'laris is not, technically, a demon in the same sense as the others, but rather a Limbo (Otherplace) Demon. He has stayed out of the various power struggled that have encompassed the realm, including Sophia Strange's stewardship of the realm, partially because even cruel demons like S'ym and N'astirih wanted nothing to do with him. Many demons of Limbo enjoy torture and harming others, and many of them do it for the pleasure of doing it, but only C'laris does it for no more reason than because he can. In a realm of chaotic evil creatures, C'laris stands out as a true sadist.
Though he presents himself as merely one of six equals, C'laris is the true mastermind behind the Six-Fingered Hand. Though he claims each of them will supplant their respective rulers and divvy up the remaining Hell Realms and Earth between them, he has little intention of honoring that agreement. When the Evil Eye is assembled, he'll turn on them and take its power for himself.
As they fight and squabble, though, he wonders if he shouldn't just save himself some time and aggravation and kill them all now.
And with that power? He's going to watch it burn. All of it. A glorious monument to destruction across all the Realms. And who knows? He may even go on to kill Eternity itself.