The reason why she has this companion cube in her ear is because a fatal attack from someone.Her skull busted open, her ears were torn off, (and some parts of her limbs) and her eyes were pulled out of their sockets. she is now being taken care of by reseachers who reconstructed her body from other materials. the conpanion cube has vein like cords that stretch over her ears into her brain and give her emotions. Her eyes are artificial and her other eye is too damaged to repair.