Doppel Luka

Doppel Luka is a monster created by Promestein, intended to mimic Luka's physical appearance and abilities.

Monsterpedia Entry
"A clone of Luka created by the pinnacle of Promestein's genetic engineering technology. But her gender isn't set, and can be switched between male and female at will. She was created using samples taken from Luka during the Wormiel fight, and has all of his memories and physical abilities from that time. When she takes a female form, her thinking and personality also changes to become more feminine."

Battle Overview
"Despite being a weird battle, its pretty easy, with one execption.  If you use any of the Cursed sword moves, Doppel Luka can counter with the same attack rendering them useless.  So, summon Gnome to break her Binds, use normal attacks, and save SP for healing. After she strips, Undine is effective. In addition, depending on when you lose, it will change whether she's dressed or not during the rape scene after. Oh I wonder what you're going to try now!? Now go, oh elaborate masturbator Luka. Because you disappointed me, I can tell you're the real one."

Evaluation
"You raped yourself...? Couldn't this just be said to be some elaborate form of masturbation? Doppel Luka can offset all of your sword skills. You can't fight her directly without addressing that. You should check each of your skills against her, and perhaps try to find one she doesn't know... After she strips, you can fight normally... But you should give priority to rebuilding your SP.