User blog comment:IamJakuhoRaikoben/Chapter 364: Tartarus Arc, Part 1: Sins and Sinners, Review./@comment-5036235-20131220072132/@comment-24257713-20131220095200

My answers:
 * Mashima's gonna decide on that.
 * Yes, just to fill the plot hole in Yukino's explanation during the GMG.
 * He's back in jail. Of course, he isn't an original member of the OS/OC.