* Yugi Muto: Yugi is the protagonist of the Yu-Gi-Oh! series, and he is a powerful duelist in his own right. He has access to a variety of powerful cards, including the Dark Magician and the Blue-Eyes White Dragon.
* Joey Wheeler: Joey is Yugi's best friend, and he is also a skilled duelist. He is known for his "luck of the draw" ability, which allows him to draw powerful cards when he needs them most.
* Seto Kaiba: Kaiba is a rival of Yugi's, but he is also a powerful duelist. He has access to a variety of powerful cards, including the Blue-Eyes White Dragon and the Obelisk the Tormentor.
* Mai Valentine: Mai is a skilled duelist who is known for her beauty and her psychic abilities. She has access to a variety of powerful cards, including the Harpie Lady and the Cyber Angel.
* Jaden Yuki: Jaden is the protagonist of the Yu-Gi-Oh! GX series, and he is a powerful duelist. He has access to a variety of powerful cards, including the Elemental HERO Neos and the Rainbow Dragon.
Ultimately, the best teammate for you will depend on your playstyle and personal preferences. If you are looking for a powerful teammate who can help you win duels, then any of the characters listed above would be a great choice.