Alright, some ideas:

*Kasyra'Tala vas Ryushei, only known as Blue-Ice by her old group (whether with/without the dash, I forget), is an ex-Blue Suns. Though the only reason I could see her getting hunted down is because of another current or former Blue Suns that has a problem with her. Maybe an associate with someone she killed or messed up (which she did to a good number of people).

Though, really, just about everyone in Nova could have someone hunt them down. 
E.g. Eclipse is still after Kosso for selling their information out to anyone that wanted it while under their employment. Roland probably pissed someone off when he killed the man that may have been the murderer of a relative. They couldn't prove he was guilty, but it could look suspicious enough for someone to guess/know/assume. Kygg's screwed over the Blood Pack when he left, and at least in one of the old RP's there were a couple guys that'd like to see him dead.

*In whatever the next mission is, she could bump into them on her own job (or on her way to her old job), and either one helps the other out, or it ends up being the same job that they play allies or rivals to.

*If she'd be willing to work for turian separatists, and the next mission is Mactare, she could be at the location Nova's attacking to turn in or gain a job. There might be one other group she could get hired by, but I'd have to figure how that'd work.