Derrick Walker

Diedrick Wolf (ディードリック·ヴォルフ Dīdorikku Vorufu) is a main character of 48 Days. His epithet is "Iron Wall". Diedrick's speciality is Action Duels, where he overwhelms his opponent by making them unable to move while they don't conquer his "challenges".

UPDATE: New name Derrick Walker (American)

Deck
Wolf runs a Hercules Deck, based on the twelve labours of Hercules. Each of his monsters challenges the opponent to conquer a challenge, and only by surpassing the challenges they can reach Wolf.