|Weapon|| Gallting Gun|
|Voice Actor||Chika Sakamoto|
Kuro (AKA Kuro-chan) is the main protagonist of the series. He was a normal housecat owned by the Fuji Grandcouple. He was in love with the neighborhood dog, Pooly until he was kidnapped by Dr. Go and transformed into a cyborg with invincible steel frames, unlimited strength, and various armaments. Kuro manages to escape only to be heartbroken after learning Pooly moved away from the day he was taken. Since then, Kuro resumes his normal life while keeping his cyborg identity a secret to the old couple/
Kuro is portrayed as a domestic black cat with black fur and white underbelly. After being turned into a cyborg, his body is cybernetically modified with metallic and extremely durable armored skin. To hide his new identity, Kuro finds a cat doll similar to his past normal self in a UFO machine, and wears the black cat costume with the stuffing removed.
While appearing as a normal cat o the outside, Kuro's attitude is hostile with a horrible temper, gets angry easily. Now as a cyborg, Kuro's temper getting the best of him turns him into an out-of-control berserker. Regardless, Kuro is noble and good-hearted by natural feline instincts. He loves the Fuji Grandcouple who adopted him and is willing to do great lengths to protect them and his friends.