Korin is an ancient, wise feline entity who serves as a guardian and master of martial arts. He resides at the top of Korin Tower, an immense structure that acts as a nexus between the earthly world and the divine lookout above. Having lived for over eight hundred years, Korin has observed countless warriors and played a direct role in shaping some of the world's greatest fighters. He is characterized by his wisdom, patience, and a subtly mischievous demeanor. He does not grant power freely but believes in the value of effort and perseverance. His training methods, while seemingly simple, are highly effective.

In Mystical Adventure, Korin's direct presence is less of a hands-on trainer for the main cast compared to the original series arc. Instead, the narrative surrounding Korin Tower serves as a significant plot device for the characters Bora and Upa. They seek the Dragon Balls to wish for the end of the military occupation of the land near Korin Tower, establishing his domain as sacred ground under threat. The film compresses the intensive training regimen Goku underwent with Korin in the original series into a much shorter sequence, reflecting the movie's faster pacing, while still emphasizing Korin's role in sharpening Goku's skills. Korin's primary relationships in this story are rooted in his position as the guardian of the tower. He is a foundational mentor figure; it is established that he once trained Master Roshi. His brief training of Goku reaffirms the dynamic of a wise master guiding a pure-hearted student.

Korin is fundamentally a guardian. His motivations center on the preservation of peace and the responsible cultivation of strength. He supports those who seek power for righteous purposes and guides the world through quiet vigilance from atop his tower. His most prominent abilities include immense speed and agility, mastery of the Zanzoken technique, and the ability to read the minds of visitors. His role as the cultivator of Senzu Beans makes him an invaluable resource for the world's defenders.