Kumatetsu is a fictional character from the anime and manga series The Boy and the Beast, created by Mamoru Hosoda. He is a large, bear-like creature known for his gruff demeanor and strong personality. Kumatetsu serves as a mentor to the main character, Ren, guiding him through challenges in the Beast Kingdom. Kumatetsu is characterized by his desire to become stronger and earn the title of a great warrior. Throughout the story, he undergoes significant personal growth, learning the importance of friendship and responsibility while forming a deep bond with Ren.