I'm convinced there is only one Mafian left. Games typically have 3-5 Mafians, and since 3 have gone and this game has a smaller size, it is good reason to believe there is only one remaining.

My Thoughts
Jin-His claim seems to ring truem I just wish he was more active,

Renji-He claimed doctor. He is inactive. I want to believe his claim, but we can't be sure.

Ulqiuorrra-He is muddled, irrational, and gives conflicting, useless, or just plain wrong information. I might press him to see if he slips up, but we can't be sure.

Mayuri- I can't read him. He is obviously a strong player, which makes him harder to read. I'm leaning town, but I can't be too sure.

Rukia-Alas, my best friend of this game still faced the possibility of being evil! She has played a role in axing Mafians, but was that just to cover her up? I'm leaning towards cult for her.