Kris and Devis: Originally two (gay) high school characters of mine. Kris has a more serious, leader-like personality while Devis tends to do his own thing. I love throwing them into various situations in different roles.

Skye: My first OC ever. Ever ever ever. I love him to death. An elf who likes to kill things as a hobby. Not very social. The only main difference is that in this story he's a human and far more submissive. Had Alden tried to pull anything on the original he'd be gone in a second.

Alden: A completely different character altogether, almost. The original is my Haunter in human form. He's got a thing for riddles and likes to confuse and frustrate people, but altogether he's a nice guy/Pokemon. I've also used him as a ghost in another story, executed in Victorian England for killing murderers, prostitutes, etc. Also very nice and had good intentions.
The Alden here is... if you put either of the other two on acid, they had a bad trip, and you tried to make them feel better by giving them even more and washing it down with a bottle of window cleaner.
I really don't know.