I never would have thought it possible, but my favorite characters of the season were Black Cindy, Tucky and Boo. Cindy was a surprise for me, but she really got me with her speech about why she truly did want to convert .and not just for the kosher meals. Tucky and Boo have a great friendship, and I loved all their scheming.
Piper is a horrible, horrible person. So she went from being all bummed that Stella was leaving to basically ruining her life when she found out that she swiped her cash, and add to that she only stole it because she was freaking out because she was leaving prison with $20 and no one on the outside? She is straight up cuckoo. She has to have some sort of mental illness or personality disorder.