Karin Sen'nin, known simply as Karin, is a wise, immortal cat who lives atop Karin Tower in the Dragon Ball series. Serving as a martial arts master and spiritual guide, Karin is the keeper of the Senzu Beans, which have powerful healing properties. He plays a crucial role in training main characters like Goku and assists them by providing wisdom, guidance, and aid during their quests. Karin is respected for his intelligence, calm demeanor, and pivotal support in battles against strong opponents.