Nope. He probably had something planned for them and cut them out by the time he actually got to writing this part. They could be the original versions of Rahab and Gilies but I have no other ideas on who they were supposed to be. 

huh, that's weird? capriccio farce came out in this album, and those two would have already been singled out as being "invaders," implying that they wouldn't be representative of the sins, and the pv itself came out only a two months later?

It would make sense for the Luka to be Envy/Rahab, especially since her daughter is a Luka character as well.

Rahab's daughter isn't a Luka. She's Levia, who is a hot mess. And Rahab was inside Ma at this point besides.

I don't think these are really indicative of canon anymore anyway.

You're right I forgot about that (but there is screwier stuff in canon XD) I meant the same Vocaloid~ May not be canon, but it's still fun to speculate~