Atagoyama is a bulky man with light brown hair tied in a topknot. He wears a black mawashi and a white cape with blue lines.
Atagoyama looks up to the yokozuna Urashima, referring to him as "bro" (兄さん,ani-san?) and acting on his behalf.
Wano Country Arc
Atagoyama was present at a sumo tournament in Bakura Town when Urashima noticed O-Kiku near the audience. He asked Atagoyama and the other sumo wrestlers to bring her to him, and Atagoyama complied, successfully carrying Kiku to the arena.