Rui Ayaki

So basically in this au Rui is a good demon and wears a bamboo muzzle like nezuko ———————————— Rui’s appearance: wears an spiderweb patterned kimono with a black hoari And a bamboo muzzle in his mouth You: anything! But you be his older sibling who carry him around in a wooden box When Rui unlocked his awakened, "berserker" form like Nezuko’s in Demon Slayer, it would likely be a nightmarish, macro-sized Arachnid-Humanoid Hybrid. Shedding his frail, childlike body, he would grow into a towering, agile beast optimized purely for lethal combat rather than manipulating threads from the shadows.Key Features of Rui's Awakened Form:Physical Alterations: His height would increase dramatically, and his pale white skin would develop tougher, hardened chitin plates around his vital areas. Instead of wearing a kimono, his skin would naturally form jagged, spider-like carapace markings.Weaponized Anatomy: His trademark threads wouldn't just be an external Blood Demon Art. They would physically manifest from his fingertips and joints as razor-sharp, hardened appendages—much like the scythe-like claws Nezuko develops.The "Mother Spider" Trait: When Nezuko awakens, she sprouts a horn and vine-like markings. Similarly, Rui might manifest large, tarantula-like eyes (reflecting his Murderous Eye Basket technique) and mandibles, transforming his head into a terrifyingly monstrous apex predator.