ashigara (housamo)

"A Transient sumo wrestler with a dynamic and care-free attitude. When younger students ask him for help, he heartily agrees, making him quite popular at school. Back in the mountains of his home world, he lost to a certain man in a sumo match and chose to quit while he was ahead. Ever since, he has trained ceaselessly in sumo technique and honed his mind, body, and skill. As a result, he has come to be called the strongest in the nation, giving him the right to wear the Sacred Artifact of a Shinto Straw Festoon. He feels a strong empathy toward one born and raised in the mountains who presents a gloomy nature and a penchant for becoming attached."

https://housamo.wiki/Ashigara