Thread-bound fairy creatures of the twelfth floor, all of them freed when the Bijou Trap fell into the Nothing.
Thousands of bijou were held by the Bijou Trap, each still connected to it by threads reaching all the way to The Twelfth Floor. When Justice Light dropped the trap through the portal into The Nothing, the system announced that the Bijou Trap was deactivated and all captured Bijou had been freed.
Their threads did the actual work. Justice Light spent his last moments imagining four separate planes — all jumbled and confused — folded and moved together as the unbreakable lines of the bijou fairies tightened, creating a flower pattern, before the darkness at the center of it all broke apart.
Fairy creatures tethered by unbreakable threads that stretch across planes; the tightening lines draw a flower-shaped pattern.
The trapped fairies whose unbreakable threads pull four planes together and tear the Nothing open.