The thing to remember here is that she's not a party in a legal matter -- she's a witness.
I have been a witness in several legal matters -- both personally and in a professional capacity. If I felt a need to hire a former Federal prosecutor as my attorney, I'd have to be in some serious legal jeopardy myself.
Ford doesn't need to negotiate immunity from perjury as a condition for testifying (as one rumor had suggested last week). That's absurd on its face ("I'll testify, but you can't prosecute me if I lie."). In fact, she wouldn't need to negotiate immunity for anything she says as a witness in a Senate hearing as a condition of testifying. She'd have to be negotiating an immunity deal for something she's already done.
If there are any immunity discussions taking place, I'd say they are deals for immunity in exchange for her to recant her story and go away.
Who is the Fed. Pros. and who is the Inspector General she hired?
Not really. The best law firms hire former federal prosecutors as their criminal defense lawyers. It's actually really hard to have credibility in criminal defense at those levels without having worked as a prosecutor because of both street cred and because former prosecutors have an automatic leg up over non-prosecutors in dealing with the current prosecutors. So if someone is footing your legal bills, your criminal defense lawyer will likely be a former prosecutor of some stripe. I don't really see anything odd about this that we could read into.
No she is the accuser.