The Abyss Princess and the Balladeer

MAIN SHIP: !!SCARALUMI!!
The Abyss Princess Lumine, was going through a stroll to clear her head, when she noticed a glimpse of someone with purple hair, and looked very much like the Raiden Ei, her thinking it was a good oppurtinity to try and kill them, the figure looked at them like they had seen a ghost.
Who was this guy and why did it seem like he knew her.