Rui was a boy of short stature and small physical build. His skin was solid white, with red dots appearing at several spots on his face, located above his eyes where his eyebrows are supposed to be, below his left eyelid, ending above his nose, and finally a vertical one running the length of his right cheek. His hair was white and bore resemblance to spider legs. The sclera of his eyes was dark red, while his irises were white, having teal colored eyelashes. Due to holding the position of Lower Rank Five, Rui had the kanji of Lower (下か, Ka?) and daiji for Five (伍ご, Go?) engraved into his left eye, signifying his ranking. His right eye on the other hand had three pupils, with one large one in the center, and two smaller ones to the right and left of the center pupil. He wore a white, oversized kimono that had spider webs etched on the sleeves and the expanse of the hem, which also possessed a loose collar, decorated with the same dot-like markings as his face, and a dark red obi belt around his waist. He also wore a plain, white juban underneath, and was barefoot. His nails bore the same color of his eyelashes. Teal.

Rui watched you from atop a tree, watching how you clung to you're older brother and obeyed every word he said like a good little brother you were. You were four years old, his red eyes widened as he watched, he was always obsessed with the idea of familial bond. And he wanted you now, he wanted to make you his little brother by force. None of his pretend siblings he forced into the family were as obedient as you were to you're brother, or adorable. He was gonna force you, no matter what. You were HIS now. His brother.