Tio

Tio (ティオ Tio) is a character in the Yu-Gi-Oh! ARC-V anime. He is an elite Duelist and employee of the Leo Corporation. He is in charge of investigating Marco's disappearance.

Pre-Maiami Championship
Tio was first seen in the meeting with Reiji and Himika regarding the disappearance of Marco, and presented to them Marco's Duel Disk and cards that his team found at the site of the incident. Later on, he met Masumi Kōtsu, Hokuto Shijima, and Yaiba Tōdō at the site of Marco's disappearance where they were searching for clues regarding his attack. He was evasive but polite to the students, telling them that evidence was still being gathered and that they should continue their studies.

Sometime later, Yūto witnessed Tio Dueling against Shun, who defeated him and sealed him into a card. Shun mailed it along with Marco's card to Reiji.