.-. just a suggestion but have you tried a certain 'theme' to a certain character o.O
It helps a lot of artists so that way their characters aren't a like to much ^^

--- is random >w<

d: sorry to bug your journal xD

Well, dunno if you're the person too, buuuuut, watching/ready anime/manga you normally wouldn't get into might help. I've made a few characters that way. Or just doodling randomly till you find something you really like. Which is how I came up with Ikefume. (He was originally supposed to be a girl, but it turned out guyish)

Plenty of ways to try and varie your characters up. Sena I felt was a bit typical for a demon, so I'm making her Chilean, to mix up the background information. XD

But, yeah, I am always willing to help ya if you need it. :D

P.S. I think a lot of your characters are nifty, regardless. x3