Yes they are the real deal. They sold a while back with lots of other prototype stuff. The Middle doll Rapture has a unique face mold and is owned by the Original Jemboy from the USA, I believed he gave his credit card a battering for these dolls. I owuld have bought Rapture and Minx but not Riot he's awful, worse than Rio ( I don't even have any Rio's now LOL)
I am guessing it could be a ooak doll of the character Lindsey Pierce. I wanted to send you a pm like you asked, but it said I had to befriend you, and I am not if that worked out. I missed some messages and details and I am having a hard time with the interface, so I am sorry if there was a delay. There is a Jem con every year, but I have not been able to travel to it. That is where the doll came from, maybe if you ask the jem com folks, they have a website and a mailinglist about jem con.
Rapture looks a bit more like the Maxie style dolls so I guess it's confirming the way the Jem dolls where changing. All the Maxie dolls have the style of the later unreleased Jem dolls such as Rapture above and Rockin Romance Jem