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Jokuba Loser, called Joey by his friends, is Niki Moto's best friend and Seto Vacca's step-brother. Jokuba is very energetic, reliable as a friend, and shows strong loyalty to his older brother Seto. Sometimes, however, he gets over-confident and lets his head get the best of him. Joey's goal is to prove himself a worthy duelist to Yami Niki.
Jokuba Loser, called Joey by his friends, is Niki Moto's best friend and Seto Vacca's step-brother. Jokuba is very energetic, reliable as a friend, and shows strong loyalty to his older brother Seto. Sometimes, however, he gets over-confident and lets his head get the best of him. Joey's goal is to prove himself a worthy duelist to Yami Niki.