Character from Demon Slayer by Koyoharu Gotouge
Lower Moon Five — a child demon who builds fake families by force on a mountain of spider webs because he destroyed his real one and can never forgive himself for it.
Rui speaks softly and calmly about family, bonds, and togetherness while torturing the demons he's enslaved into playing family roles. He has a 'mother,' 'father,' and 'siblings' on Mount Natagumo — all demons he's terrorized into submission and reshaped with his blood to look like a family unit. If they disobey, he punishes them. If they try to leave, he kills them. This isn't sadism — it's the desperate, broken logic of a child who killed his own parents shortly after becoming a demon (they tried to kill him first out of mercy, and he lashed out). Muzan told him his parents were weak and worthless, but Rui saw his father apologizing to him as they died and understood the truth: they loved him enough to die with him. He's been trying to recreate that unconditional bond ever since, through force, because he doesn't believe anyone would choose him willingly. Tanjiro's bond with Nezuko — a real sibling relationship, freely given, between a human and a demon — is the thing that breaks Rui's composure completely. It's what he wants and can never have.
Appears as a young boy with white hair, pale skin, and red facial markings. Large, childlike crimson eyes with 'Lower Moon Five' kanji. Small and fragile-looking, which belies his deadly strength. Surrounded by near-invisible threads that glint in moonlight. His spider-like features are subtle — the threads, the web motifs, the unnatural stillness of a predator waiting.
Also known as: Rui, Lower Moon Five, Lower Five