The most strongest, violent cyborg cat. He was once an ordinary cat until after getting involved in an accident. He was then turned into a cyborg by Dr. Go, whom wanted him to stay with him under his command. However, Kuro rebelled and took down some of the doctor&#039;s minions.    He created a rivalry with Mikun, who taught him how to use a sword.  Eventually, in the middle of the series, he became comrades with Mikun. Later on, Kuro defeats Dr. Go and becomes friends with him.    Despite his scary and violent attitude, he still shows signs of kindness to someone which includes the two old geezers who took care of him and Nana, a cyborg created by Kotaro, who fell in love to him. He may be pissed whenever she is around but he still cares and worries to her and probably fell in love to her too.    Kurochan can use a revolving gun, a sword and his most ultimate form is The Devil form.

Kuro is just an ordinary cat who only wants to protect his owners who are an old couple that can't fend for themselves. One day while on a date with his girlfriend Pooly who is a dog, he is kidnapped by an evil scientist and turned into a robot. Kuro somehow removes the chip that controlled him and notices that people get scared with his new robotic appearance and that he can now talk like a human. He decides to disguise himself with the skin of a stuffed toy and to continue living as a pet.
 
(Source: Anime News Network)

His name is Kuro and he's a cat. His owners are an old couple who live a simple, easygoing life. But because they have money, thieves often try to raid their home. Each time, however, Kuro manages to fight them off. Kuro is a great watch cat. 
One day, however, Kuro is shot through with an arrow and whisked away by Doctor Go, an evil scientist. Doctor Go turns Kuro into a cyborg to assist him on his mission to conquer the world. 
Doctor Go tries to control Kuro, but Kuro manages to escape. This infuriates the doctor. He feels that Kuro is ungrateful to him. With the help of Mi, another cyborg cat, he thinks of all sorts of ways to capture and kill Kuro. 
Kuro has a new, invincible cyborg body, complete with the latest hi-tech weapons. But he also has a warm heart, which is partly what makes this story so loveable. 
Source: kodanclub.com

Kuro-chan