Mmk, I'll give it a crack, cause I'm bored

Well, Furion strives to be the best he can be in every aspect of his life. What he sees as "best" might differ from how other see it though. Furion is left Mercinae, and joined Thakria for several reasons:
From his perspective, he was hung, drawn and quartered by Mercinae, for trying to do his duty by learning to fight. Just because he was learning from Thakrians, doesn't mean that he wanted to change sides, he was pushed away by Mercinaens judging him for doing what he thought was right.
Then, he joined Thakria because he wanted something to fight for. A cause. He felt that Thakria could give him what he wanted. In return, he gives Thakria what he can. His loyalty, his life, etc.
When Furion was newly Thakrian, he decided to join the Warlocks. He slowly became more sinister and dark, and found that the Mage skillset didn't please him anymore, instead of trying protect the light, he now wanted to destroy it, and felt that he could achieve this better as a Sorcerer.
Slowly, he started to get used to his new skills, and decided he wanted to take the next step in serving darkness; he wanted a new patron. So he sought to join the Order of Vengeance, and once he was accepted, he swore an Oath of Vengeance against Mercinae and the Light, and slowly increased his efforts to kill and offer people to his Lady.
He doesn't see himself as 'evil', in fact, he sees himself as righteous and good, and sees Mercinaens as evil. He's obviously deluded, but yeah, that's the fun thing about playing him
