Jack

A character introduced as Zakira's follower. A very young about the age and height of Teru. His main objective to join Zakira was to defeat the world champion Shobu who have recently started to use the new cross gear and cross gear evolution cards. But Jack's father was a researcher who was looking very deep into these cross gears and wanted to get to the dimension Duel Monsters and try to get some of the new cards which will counter specifically the cross gear cards. But he was actually funded by Zakira unknowingly because Zakira would send his Qumbeech or Peeskwhy only to give any messages to the boy. After the research was about to finish all the cards that jack's father found was usually played by Jack and he was pretty good at it, but could not use its true power and always wanted to against someone strong who have a cross gear card like Shobu. Zakira took that situation made the boys desire into revenge by taking his father out and telling Jack his father true desire was to him to go against Shobu and Zakira would help him.

Jack defeated Shobu in a small duel against Shobu's cross gear deck even though Zakira told him not to do this till the tournament. Jack was later defeated by Shobu in the tournament because Shobu had other strategies as well in his deck. Jack was only blinded by the counter strategy that he inherited by his dad. Later Shobu's father Shori Kirifuda brought Jack's father in front of him telling him he is all right and revenge is not good there are other ways as well to solve the problems people have by becoming friends.

Deck
He used Fire, Darkness and Rainbow Civilization cards in his deck. Mostly that would counter Shobu's cross gear strategy. His signature card is that was given to him by his dad Jack Valdy, the Everlasting.