Ok, theory time.
First, let's start with Final-Fan. He could be the Godfather but I have 1 problem with this. He set up a "fail proof" plan for the town to win with double lynches. However, if he was the godfather and axumblade and invisible were both mafia then why would final-fan switch the sacrifice from axumblade to invisible? it wouldn't make sense at all. We'd get our 1 kill and be happy, he could then double kill gnizmo and invisible, and along the way murder someone every night for an easy mafia win. Final-Fan doesn't make sense as a Godfather.
Axumblade - If there are 3 mafia and no serial killer (assumed since there have been 0 serial killer deaths), there is no way he could be mafia. Both him and Vetteman were both willing to die to prove their innocence and they both thought the other was mafia. This makes me wonder if he is indeed a townie.
dsister - Protected invisible with quite a passion along with trying to defend j0. Probable Godfather, but maybe not.
Gnizmo - He was very quick to try and lynch Axumblade, which was then confirmed he was abducted by DGC. He then said I'm the Body Snatcher quite obviously. This leads me to believe that he is mafia, as he wouldn't know I targeted Vetteman unless he executed the hit himself. It would be possible for the mafia to target Vetteman for an easy kill and to confuse everyone (since I claimed to have a semi protective role) While the obvious choice of a mafia kill is either myself or DGC I hadn't confirmed that I was the body snatcher yet, but I did leave hints all over the place.
anyways, based on all this, I feel comfortable abducting Dsister and lynching Gnizmo.
vote: Gnizmo