Zenon, a member of the Klondike criminal organization within the Kingdom of Fourland, exhibits a radical personality reflected in his numerous piercings. He views Tilt, right-hand man to Klondike leader Ban Klondike, as his direct rival within the family structure.

He commands the X-Playing Card ♦J (Jack of Diamonds), bearing the name "Out of Five." This card allows him to manipulate an opponent's five senses and cognitive perceptions through sound. Activating this ability requires Zenon to scratch his gauntlets against a surface, generating sounds that distort sensory input and mental processing in listeners.

Zenon played a role in a significant event from Finn Oldman's past. Alongside Ban Klondike, he manipulated Finn's memories concerning the death of Finn's parents. They altered Finn's recollection to make him believe his family died in a car accident, concealing the true circumstances involving the Klondike Family and the Black Knight figure associated with the X-Playing Card San Galgano. This memory manipulation occurred at Finn's childhood home on the night of his seventh birthday.

Within the Klondike Family, Zenon actively seeks scattered X-Playing Cards to further the organization's objectives. This mission places him in direct conflict with groups like High Card, who recover the cards for the royal family.