Yusei is the main protagonist of the series, a young man who grew up in the Satellite. When he travels to New Domino City in order to retrieve his Stardust Dragon from Jack Atlas, he soon discovers that he is a Signer, a person chosen to bear the mark of the Crimson Dragon. While he initially bears the mark of the Crimson Dragon's tail, it is replaced with the Dragon Head following his battle with Godwin. Yusei is a cool, attractive, calm and collected duelist who believes no card is useless, and is admired by many people. He values his friends above all. Yusei uses a Junk Deck which focuses on managing small monsters of various levels in order to summon out powerful Synchro Monsters, such as Junk Warrior. His key card is Stardust Dragon and he later obtains two further evolutions: the powerful Majestic Star Dragon and the Accel Synchro monster, Shooting Star Dragon. At the end of the series, he is able to perform a Limit Over Accel Synchro to summon his strongest monster, Shooting Quasar Dragon. At the end of the series, he becomes a scientist and remains in New Domino City to look after the place everyone will return to when they fulfill their dreams.