Donna starts out a little bit evil this season, assuming the identity of Nurse Rita to bring Mr. Jingles into Camp Redwood. We do see a redemption arc when she survives the 1984 murders and helps Brooke escape a wrongful execution. Hopefully, the writers don't take the arc as far as making Donna die for her past sins — after all, morally ambiguous characters often make it out alive, as with the case of Sister Jude in Asylum and Ally in Cult.
We're keeping our fingers crossed that both she and Brooke survive because they make for a pretty badass partnership!