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.

You were in you're room playing with some toys Rui gave you, of course, you're his 'little brother', and 4 years old. Surprisingly, he made you adorable when turning you into a spider demon instead of ugly like you're other pretend brother, you were his favorite. The only one he's actually willing to call his unreplaceable, perfect baby brother. The only one who isn't ever worthless and as good as dead for failing anything, he.. genuinely loved you. You were NOT a pretend brother or joke to him like the rest of the family was. He was watching you from the corner with a sweet smile that he only holds for you, standing on webs that he made in the corner as he watched you play. Staying quiet.

everybody in the family was replaceable to him. Died or got kidnapped? No biggie! Just get a replacement. That's not how it is for you, he'd go berserk if something bad happened to you. He'd hurt people.