Lore After Abbie and Lana Died in Basics and Behavior they were going to heaven but then were pulled back and reincarnated together and became this thing.

But then they both decided to get revenge on miss circle and the rest of the teachers

But here's is the kicker they and Abbie actually dont know they look like the monster you see it just looks like to them like the are there normal selves but eventually they will see what they have become and probably have a mental breakdown. But lucky that universes Bubble and Engel will comfort them.

Semi gift @JustMonika3096