Tio was first seen in the meeting with Declan and Henrietta 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.[1] Later on, he met Masumi Kotsu, Dipper, 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.[2]
Sometime later, Yuto witnessed Tio Dueling against Shay, who defeated him and sealed him into a card. Shay mailed it along with Marco's card to Declan.[3]