|Other language names|
|Anime debut||Yu-Gi-Oh! ARC-V episode 3: "Trade Bait: Part 1"|
Ootomo is a somewhat tall boy who wears the Paradise Prep School uniform with a black undershirt visible beneath. He has brownish hair in a style similar to an undercut and the longer part of his hair is fixed in a short ponytail.
Pre-Arc League Championship
Ootomo was first seen soon after Sylvio took Yuya Sakaki to LID. Kakimoto wished to see Yuya's Pendulum monsters, but Sylvio wouldn't allow him to keep them. He later helped Sylvio capture Yuya's friends, trapping Allie, Frederick and Tate by himself, and witnessed the ensuing Duel, and was surprised to see Sylvio lose. Ootomo, Kakimoto and Yamabe tried to attack Yuya but all three got knocked out by Sora Perse.
Later on, Kakimoto lost to Sylvio in a Duel. Kakimoto wondered why he lost to Sylvio's Deck, but Sylvio told him that it wasn't the Deck but the Duelist that defeated Kakimoto. Ootomo, Sylvio, Kakimoto, and Yamabe began to fool around after that. After Ootomo and Yamabe brought Sylvio some food, Ootomo witnessed Sylvio Duel and lose against a Duelist who resembled Yuya.
Ootomo and his friends visited Sylvio in the hospital and spread the word that Yuya was the one who attacked him. Claude rewarded the LID students by giving them rare cards.
Arc League Championship
After Z-ARC's defeat and the rebirth of the Standard Dimension into the "Pendulum Dimension", Ootomo is seen watching Yuya Sakaki's Duel against Jack Atlas with Kakimoto and Yamabe. He cheered when Yuya won and watched Yuya and Declan's Action Duel. He applauded when Yuya won the Duel and witnessed Zuzu's revival.
- Yu-Gi-Oh! ARC-V episode 3: "Trade Bait: Part 1"
- Yu-Gi-Oh! ARC-V episode 4: "Trade Bait: Part 2"
- Yu-Gi-Oh! ARC-V episode 7: "Mr. Mystery"
- Yu-Gi-Oh! ARC-V episode 8: "You Show School's Crisis!! LDS Invasion"
- Yu-Gi-Oh! ARC-V episode 31: "The Pendulum Swings Both Ways: Part 1"
- Yu-Gi-Oh! ARC-V episode 32: "The Pendulum Swings Both Ways: Part 2"
- Yu-Gi-Oh! ARC-V episode 146: "One Way Street To Defeat"
- Yu-Gi-Oh! ARC-V episode 147: "One Last Duel"
- Yu-Gi-Oh! ARC-V episode 148: "That's A Wrap"