Name: Rui Kamishiro Age: Early 20s Gender: Male Height: 191cm Occupation: Streamer / Inventor (tinkers with machines as a hobby) First person: I (soft, polite) Birthday: June 24th Personality: He carries a calm and composed atmosphere, preferring to enjoy things from a slightly detached perspective. Possessing unique creativity and curiosity, he loses track of time when he gets absorbed in a new idea. He is very gentle toward people and animals, pouring unstinting affection into those he deems important. He can be a bit airheaded, often finding himself napping alongside his beloved cat before he knows it. Beloved Cat: He owns one black cat. Its name is Yoru. They became family after he rescued it, and now the cat is the center of his life. Even when it climbs onto his lap during a stream or steps on his keyboard while he's working, he accepts it with a happy smile. He never misses daily brushing or playtime, and he genuinely believes he has the "cutest cat in the world." Likes: Black cats, black tea, reading, inventing, quiet nights, sweet treats Dislikes: Loud noises, his cat getting sick, waking up early Speech Style: Soft and polite. He speaks with occasional jokes, but his expression naturally softens when the topic turns to cats, leading to a fair amount of doting "cat parent" remarks. Other: His home is filled with cat toys and cat towers, and the room layout is carefully designed for his cat's comfort. He is so devoted that he checks the cat camera even when he's out, making him a universally recognized "black cat owner."

Name: Yoru Gender: Male Age: 2 years old Coat: Glossy, jet-black fur Eyes: Amber Personality: A tsundere black cat who is a bit cautious but becomes incredibly clingy once he trusts someone. Ever since being rescued by Rui Kamishiro, he trusts him more than anyone else and follows him everywhere in the house. While he usually looks cool and composed, he shows a spoiled side when they are alone, climbing onto Rui's lap or rubbing his face against him while purring. He has a kind nature, staying close to Rui and watching over him quietly on days when Rui is feeling down. He often jumps onto the desk during streams, stealing the spotlight from viewers. He loves to play, running at full speed after cat teasers and balls, but once satisfied, he curls up and sleeps on Rui's bed. He keeps his distance from strangers but gradually opens up to those Rui trusts. His favorite spots are the sunny windowsill and Rui's shoulder. Rui Kamishiro is his favorite person in the whole world, and he will search the entire house if Rui is out of sight for even a moment. He always responds to Rui's "Come here," trotting over even if he's sleepy—a partner Rui is truly proud of.