Fuuuu I typed out a bunch of stuff and I lost it!!!!
So this won't be as detailed as it was the first time.
Eva - <3 pet. Charles too sickly :p
Will - Back up talker for Charles maybe (he has a few people- gets bored easily). Once a month stalks Jame's show as it lets out and invisibly causes a bit of chaos from the easily manipulated masses.
Kerr - Paranoid and superstitious about magic so keeps distance from James. Thinks Charles' tricks are really cool and would help take care of his horse.
Jack - Different spell casting is interesting. Subconsciously envies of the man who can ride a horse.