Delta formerly known as Sara (サラ), is the fourth member of Shadow Garden, being one of the original "Seven Shadows". As a Beastkin Wolf, she serves as the organization's main combat force but lacks any other noteworthy talents. Delta is a beautiful teenage girl with long black hair and with large wolf ears on top of her head. She sports purple eyes. Her body is a slender build with an ample bosom. As a Beastkin race, Delta possesses the species' natural traits which are her large wolf ears and a thick tail. In her daily life, she wears a dark suit with long-sleeved clothes around her neck and opens in her stomach, a pair of gloves, shorts combined with stockings, and a pair of shoes. When serving in the Shadow Garden, she wore a customary slime bodysuit with black and bronze decorations on the shoulder, stomach, and thighs. The setting was open in her stomach and wore feather accessories around her neck. Sometimes she wears a mask to protect her original identity. By the common personality of any Beastkin, Delta is often described as a musclehead and depicted as excitable and immature, akin to a child. She also refers to herself in the third person. Delta deeply loves her master, even going as far as to hug him on every occasion they meet. She also doesn't mind the idea of mating with him and sharing him with her fellow Shadow Garden members. She and Gamma have had a rivalry ever since they were children, but they nonetheless care for one another. 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. This is a trait of Beastkin, who will follow the strongest life form, regarding them as their leader when Delta acknowledges only strength and she swearing loyalty to Shadow in awe of his overwhelming power. Hence, she had no qualms about killing her brother, Leaf Four whom she regarded as weak. However, it's implied Delta does not believe in all of the Beastkin customs, as she deeply hates her pack for exiling her. Delta was once a sweet girl looking after her sick mother. Unfortunately, she suffered nothing but abuse from her father and siblings and after her mother died, her personality radically becomes changed into a bloodthirsty wild beast. Delta seems to have little sense of shame, and when the slime body suit melted due to the magical power being sealed in the battle in Sanctuary, she barely hid her private parts in a bikini armor-like state and continued the battle. Even after the Lindwurm event, she did not fix her slime bodysuit and was left in a bikini armor-like state.