Yu-Gi-Oh! ZEXAL Episode 3: "In The End, Part 1"
Mr. Kay is a professor at the Heartland Academy that Yuma Tsukumo attends, and was one of the characters possessed by one of the "Number" cards; "Number 34: Terror-Byte". He seems to be the main teacher for Yuma's class, as seen during parent's day at Yuma's school.
When Caswell asked him to help Yuma find Emperor's Key using the Crashbug virus he created while he had a "Number", he was confused about this, but then accepted when Caswell blackmailed him with telling everyone that he is responsible for Crashbug Virus incident. Using the virus, he located the Key and opened the door to the building where it was held for Yuma to go retrieve it.
Mr. Kay uses a "Crashbug" Deck revolving around Summoning his "Number", "Number 34: Terror-Byte". Much like the effects of his cards, his Deck represents what he has done - hacking into computer systems and taking control of them, launching "bugs" en masse, and wroughting many people (and the infected systems themselves) trouble because of it all.
- ↑ Yu-Gi-Oh! ZEXAL Episode 3: "In The End, Part 1"
- ↑ Yu-Gi-Oh! ZEXAL Episode 19: "The Edge of the World"
- ↑ Yu-Gi-Oh! ZEXAL Episode 23: "Hunting Down the Hunter, Part 1"
- ↑ This card was present the Deck in his Duel against Yuma Tsukumo. It was later absorbed by Astral upon his loss against Yuma in episode 4.