If it was Star Trek, she'd be wearing the red shirt.
"Bummer of a Birthmark, Jeanine" (Obscure FarSide reference....)
Tony. That's an obvious one. If he's a bad guy, Jack will take care of him. If he's a good guy, he'll die in some noble method around hour 22 or 23.
Jack's daughter (what's-her-name?). Other than eye candy, she's just too annoying to keep around. In season 2, I was rooting for the mountain lion.
The president's husband. He seems to like intrigue too much. Especially if he turns out to be a bad guy.....whack!
others? Comments?