Delta is often described as a musclehead and depicted as excitable and immature, akin to a child. As a member of Shadow Garden, Delta loves fighting. She is shown to be merciless and sadistic towards enemies, leaving none of them alive. This makes her dangerous, as she will go overboard in brutality and even unnerve her master and her comrades. She's very bloodthirsty, along with her nature as a Beastkin, making her prone to react impulsively. Delta also tends to act like a dog.