Okay, okay, this literally just fully formed in my head, so I gotta write it before it devolves into bubbles and I forget it!
Killian Lu Rewrite version 1.0, for my ridiculous Strixhaven fic: Killian is one of the top Silverquill students, the pride of his father, Embrose Lu, the Silverquill Dean, the envy of most of his peers and the ovject of affection of the rest. HOWEVER, Killian doesn't strive for success for reasons that would be obvious- making his father proud, academic success, or even for a future he has in mind. Killian rises to the top for a single, secret purpose: revenge.
Killian had a childhood friend, a few years his senior, who attended Strixhaven, who was killed in a confrontation involving the Oriq the school attempted to cover up- only somewhat successfully since a then un-enrolled Killian was able to uncover the cause of death. Deciding to take matter into his own hands and avenge his beloved friend, Killian learned all he could about the secret society despite how dangerous it was. Once he was enrolled at Strixhaven, he began his plans and made a name for himself at the school, knowing full well that it would be only a matter of time before the Oriq would attempt to sway him to their side- and then, and only then, would he be able to put his plans into action.