Korin (カリン, Karin) or Master Korin is an anthropomorphic cat who lives atop a giant tower. He is a wise cat who is over 800 years old and is a martial arts master. He is widely known to western audiences as Korin, a pun on corn, as opposed to his Japanese name, Karin.
The name is derived from K'arin, the Japanese name for the Chinese quince. His tower, the "Korin Tower" (カリン塔Karin-tō), is a play on a type of fried dough cake called "karinto" (花林糖, karintō), which fits the common theme of the characters being named after foods.
Akira Toriyama used his own cat as a model for Korin and drew him while the cat was sleeping. This is why Korin's eyes are closed. In the manga, Dragon Ball Z: Super Saiyan Densetsu, and Dragon Ball Online, Korin had blue fur. In the anime, it was changed to white.
Korin is a Senbyō (仙猫, immortal cat) and is at least 800 years old when introduced in Dragon Ball. He is a deity who lives at the top of Korin, located right underneath Kami's Lookout. Korin is a legendary figure amongst the warrior-world, hailed as "The God of Martial Arts." This frequently leads to suprise and disbelief for those meeting him for the first time, as his appearance has yet to attain the fame of his reputation.
The young Roshi was the first one of many to climb the tall Korin Tower and train under the legendary Korin. It took him three years to catch Korin and obtain the Secred Water, which was rumored to tremendously increase one's strength and speed. Later, Korin plays a large role in Dragon Ball, when he trains Goku during theRed Ribbon Army Saga. At later points in the series, Korin lends his assistance periodically to Goku and the Z Fighters by lending Senzu Beans to aid them in their battles.