Ah, I had this inspiration few hours ago and didn't stop until I saw it finished.
I didn't want for my OCs the cliches and those a bit slutty costumes girls wear a bit too often (I know, it's funny, but why men in the middle of autumn can be Hannibal Lecter or Jason Vorhees, while girls have to be stupid pirates with miniskirts and high heels or witches with their chest practically overflowing? Keep in mind that it's practically November guys!) so I chose something special for my human OCs: on the right my Julie is the Phantom of the Opera, while on the left Helen is Emily from the Corpse Bride (and even if the dress leaves some skin uncovered I liked how my OC appraises it. Being sensual doesn't mean being vulgar). Well, I improved from the first Halloween work I ever did at least!
My OC Helen is an original character put in District 9 universe.
While Julie is my and  theoracledragon OC put in Predators universe.
We don't own Predators nor District 9 aliens, and Phantom of the Opera belongs to Leroux, while Corpse Bride to Tim Burton.