Olminu, also known as Shem, is a young and athletic magician enrolled in The Oct, an anti-Ends organization. She has long hair styled into two tails, wears spectacles, and has a noticeably large bust. Despite her serious and informative demeanor regarding the Drifters and Ends, Olminu can be skittish and blushes heavily whenever people make fun of her name. She is cooperative and willing to work with others in battle and has shown to keep a cool head during encounters.