|Anime debut||Yu-Gi-Oh! ZEXAL Episode 1|
|Manga debut||* Template:Chapter * Template:Chapter|
Yuma Tsukumo is the main character of the Yu-Gi-Oh! ZEXAL series. He is energetic and has a lot of confidence and vowed no challenge, no matter how impossible or stupid they seem to be. He is very stubborn and will initially seek help from Astral. However, he considers him as a friend later. He is also a Numbers Hunter hunting Numbers to recover Astral's memories.
Yuma appears as a young boy with tan skin, red eyes, and black and red spiked hair that points out and upward. He wears a red Duel vest with a white hood and a purple tanktop with a green "D" symbol, standing for "Duel". Yuma also wears white pants with designs of three orange moon crescents attached to one another with yellow outlines at the bottom, a white brown-stripe belt, and black with blue streaks shoes with white straps.
At school, he wears a white shirt with red-lined sleeves and collar, a red tie, blue pants and brown shoes. In his nightwear attire, he wears a red-white t-shirt grey pants, and sometimes green slippers, but Yuma mostly goes barefoot around his house.
Pre-World Duel CarnivalEditYuma had same dream again about the mysterious door demanding him that if he opens this door he will receive a new power but in compensation they will lose their most important thing. Yuma thought about his most important thing as the key reacting making the ground below him suddenly crumbles away causing him to fall into a big hole. Later Yuma witnessed as his friend, Bronk Stone dueling Shark and lose the duel getting his deck taken. Yuma tried to stop them, but end up with Shark breaks his key from his neck and throwing away the pieces. Then he makes the proposal to Yuma to win back Bronk's deck, if he defeated him in a duel. The day before the duel, Bronk gave Yuma the lost piece of Emperor's Key and built so well his confidence again. On the day of the duel, Shark quickly took the lead and pulled Yuma already in the second round for half his life. Yuma's amateur skills seemed to have no chance against Shark. Shark taunted him to give up, Yuma urged that he will not give up because he has always believed in himself. Yuma's key began to glow brightly again and was brought to the door. Yuma's key is self-repairing and Yuma now had enough courage to open the door with the key. A bright light came out and for a few seconds Yuma seemed to be surrounded by Sphere Field of blank cards that are scattered in all directions. Back in reality, a foreign power was at moment begin to take possession of Shark and he Xyz Summons Number 17: Leviathan Dragon. It looked even worse for Yuma, a strange entity, Astral, appeared next Yuma. Astral told Yuma that he is a duelist. Yuma and Astral initially not familiar, which led to frequent litigation. With help of Astral, Yuma obtained Number 39: Utopia and win the duel. After the Duel, Shark was back to normal and returned Bronk's Deck as promised.
Since the duel is Astral bound to Yuma, Astral can only be seen and heard by Yuma, why Yuma's friends doubt sometimes about Astral's existence. One day at school, the network mysteriously went down, and Yuma's teacher, Mr. Kay, allowed them to use the day to Duel instead, as they could not access their virtual textbooks with the network down. Yuma Dueled his class's chairman, Caswell, but Astral was not present, so Yuma did not have access to his Extra Deck of "Numbers". As a result, he lost in one-turn defeat without inflicting a single point of damage to Caswell.
Yu-Gi-Oh! ZEXAL IIEdit
After World Duel Carnival, Yuma was once again found himself back in front of The Door, who chants that someone would come and take the most important thing form him. Meanwhile the ground starts to crumble, Yuma awake & falls off his desk. As walking home, Yuma meets up with Shark and ask him to duel, but the didn't accept since he was going to visit his sister. Just as Gilag land in Heartland City, Yuma was able to feel it. Yuma went to the hospital with Shark and hears Rio muttering about someone coming to take something important from him. This recaps Yuma's dream and realizes that his most important thing - Astral. Yuma then receives a call from Bronk in his D-Gazer, but is surprised to find Barian controlled Fuma, who challenges him to a duel in the School with the Numbers involved. Wanting to Protect Astral, Yuma leaves the Emperor's Key with Tori as he heads to the school and confronts Fuma. As the duel begins, Fuma instantly summons his Xyz monster, Machine-Armored Angel Angeneral. As Astral senses Yuma is in danger, Utopia sends itself over to Yuma, allowing him to summon it and deal some damage. Just then, Fuma activates a spell card called Barian's Force to perform a Chaos Xyz Evolution on his Angeneral to make it become Machine-Armored Djinn Angeneral, which steals Utopia's Overlay Units pushing him into a corner. Yuma was about to give up, but after Tori arrived with the Emperor's Key Astral appeared and with his help were able to summon Number C39: Utopia Ray and Number Impact to win the duel.
When racing with Bronk, Yuma bumps into Rei Shingetsu. Yuma is surprised to learn that Rei is a fan. Yuma was then dragged by the force to school, but both end up late. During lunch, Yuma learns about a pro duelist Daisuke Katagiri visiting the school. Yuma is ready to face Katagiri, but finds he can not, because it is forbidden to attend their special class. Later, Rei promises to get a Duel with Katagiri on behalf of Yuma and runs off, following it with Yuma. When Yuma sees Katagiri, controlled Barian, brutally defeat Rei, Yuma immediately begins a duel with him. Initially, Yuma plays defensively to withstand the aggressive strategy Katagari. Even summons " Number 34 Terror-Byte ", Yuma had problems, but was able to call them" Ray Utopçia "and defeat Katagiri. Subsequently, Yuma is exhausted and Rei accepts the offer to carry on his back. Yuma officially befriends Rei.