|Other language names|
|School||Leo Institute of Dueling|
|Anime debut||Yu-Gi-Oh! ARC-V episode 18: "Trapped in a Card"|
Marco is a fair-skinned man with curly brown hair and sharper dirty-blond locks beneath his fringe. He wears a puffy frilled purple shirt, appropriate for a Fusion Summoner.
Pre-Arc League Championship
Marco taught Julia Krystal how to Fusion Summon. He was first mentioned during Yuya Sakaki's Duel against Declan Akaba. During the Duel, Claude arrived to inform Henrietta Akaba of an unknown incident involving Marco that ultimately forced Declan to leave the Duel inconclusive. Later on after the Duel, it was revealed that Marco had disappeared after being involved in a Duel against an Xyz Duelist, and the only things left of him was some of his cards and Duel Disk. He was later revealed to have been taken by sealed inside a card by Shay Obsidian, and delivered to LID.
After Z-ARC's defeat and the rebirth of the Standard Dimension into the "Pendulum Dimension", Marco was freed from his card. He is later seen watching Yuya Sakaki's Duel against Jack Atlas with his LID students and applauded when Yuya won. He then watched Yuya and Declan's Action Duel. He applauded Yuya's victory and witnessed Zuzu's revival.
The only shown cards in Marco's Deck are Fusion-related.
|Shay Obsidian||14||Lose (off-screen)|
- Yu-Gi-Oh! ARC-V episode 13: "Circus Surprise!"
- Yu-Gi-Oh! ARC-V episode 14: "The Show Must Go On"
- Yu-Gi-Oh! ARC-V episode 18: "Trapped in a Card"
- Yu-Gi-Oh! ARC-V episode 141: "Swinging Back Into Action"
- 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"