Of the ones she knows about, she's less concerned about Tanic and Gallador. She thinks Tanic would likely leave her be, and Gallador's just weird. Vash has reason to want to kill her, though, and while normally he's not a match for her right now she'd be in serious trouble.
She's going to try to not think about if he has anyone else on his side...the ones she knows about are more than enough to worry her.