Well, Sociopaths tend to use people as stepping stones to get up in the world. So it may not even be a cult. They tend not to think too far ahead and plan, and often switch goals and ideals, so it is difficult to set a goal for one. They're spontaneous. But for the sake of a roleplay, I could list a few, and alter how he hides his hair and eyes accordingly. All of them will have the common sociopathic elements as to how he got to where he did.
He wants to be admired as a hero, despite being bad with morals. He likes people giving him positive attention, so he puts on a happy guise to hide his lies. He ties his hair back, and streaks it with pigment to give it a temporary blonde look, and has bangs to cover his pink eyes. He manipulates with kind words to be thought of as helpful, though he hadn't done much of anything. Usually, he does so to undereducated peasants, since there seems to be a surplus of them.
He is a thief, using sly words to get out of punishment when caught, as well as bribes and connections with guards and in wealthy families. He is searching for an old man's home, filled with ancient collectables, things he could sell or give to the wealthy families to tie the connections even further. He'd be more than willing to kill the man for it not really valuing human lives, but figured it might dampen the connections if he did, so is reluctant to do so. His hair is hidden in a shadowed cloak, as well as his eyes, so he looks like an old man when he crosses the streets.
He is a guard in the city, in high ranks through manipulation of both fellow guard and criminals, often hiding in the guise of a poor blonde peasant looking for gold to slip into their ranks, find their lair, and then lead guards to it. Though he himself rarely enters the battle, since the only weapons he is good with are knives and farming tools. His helmet usually covers his hair and eyes, though still he streaks his hair with blonde, and in this version, his hair is not completely white but a platinum blonde, with blue eyes that needn't be hidden.
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You know, you just need to learn...

How to smile.
Call me Maren, or Kyoki Faust. Or Kyo for short.
.:Vae Victis:.