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

Tio was first seen in the meeting with [[Reiji Akaba]] and [[Himika Akaba]] 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 Kotsu]], [[Hokuto Shijima]], and [[Yaiba Todo]] 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. Later onSometime later, [[Yuto]] witnessed Tio dueling Dueling against [[Shun Kurosaki]], who defeated him and sealed him into [[Tio (card)|a card]]. Shun mailed it along with [[Marco (card)|Marco's card ]] to Reiji.<ref name="ep18">{{episode|Yu-Gi-Oh! ARC-V|18|ref}}</ref>