After an unfortunate incident in the Basilica, when Prioress Gwendoline the Irascible promised to hack off the governor's hands with a chainsword, the governor decided to simply manufacture himself a harem. Even the custom-built replicants were not having any of that, and they promptly overpowered their guards and took to the wasteland. Now, assisted by other renegades, they survive as soldiers of fortune, as you do.
The rather solid lady on the left is carrying the equivalent of a shotgun. It probably fires glowing plasma, or something like that.
The fighter on the right - presumably a juve - was a more complex conversion, which involved replacing the upper half of the model's head with a lamp-type device from the corner of a terminator space marine's chestplate. I've no idea what this cyber-thing does, but it looks cool, and in the world of 40k, that's pretty much what bionics are for!
And now, time for a group photo: