|School||Goha 2nd Elementary|
|Anime debut||Yu-Gi-Oh! SEVENS episode 9: "Wonderful Jurassic"|
Kaseki Hotta (
Kaseki is a tan-skinned bespectacled boy of average height with brown hair that spikes out to the sides in a somewhat similar manner to Jim Crocodile Cook and green eyes. He wears clothing designed for the outdoors; a tan shirt with the sleeves rolled up, thick green pants tucked into brown boots, white gloves for careful handling of fossils, a tan wide-brimmed had with a red band around the base, a brown satchel, and a green bandanna around his neck with a dinosaur face print.
Kaseki is a friendly individual, and despite not being the president of the Dueling and Dinosaur Research Club he is the most forward of the group and seems to make many of their decisions. He is tremendously disappointed after finding that Gossie was not real.
Kaseki's first name is the Japanese word for "fossil", befitting his passion.
Birth of Rush Duels
After hearing about the appearance of Gossie in Goha City, Kaseki, Hunt and Kan decided to search for it and use it to create their own Jurassic Duel World. After stopping at the Tahayasty Restaurant, they encountered Yuga Ohdo, Tatsuhisa "Luke" Kamijo, Romin Kirishima and Gakuto Sogetsu, who were also looking for Gossie using Yuga's modified Goha Corporation Drone Kaizo. Kaseki introduced the Dueling and Dinosaur Research Club to Yuga and his friends and suggested that they work together to find Gossie, though in reality they planned to use Yuga and his friends to find Gossie and then find it first themselves. After several fruitless stops, Yuga's friends finally determined that Gossie could be at the location of the Relic where Yuga had installed Rush Dueling, though Luke left them before they headed to it. Kaseki, Hunt and Kan reconvened in a bathroom to discuss their plans, unaware that Luke was in the same bathroom, and he confronted them and revealed their plans to Yuga, Gakuto and Romin. Despite the group's treachery, Yuga was still willing to tell them where the Relic was if Kan could defeat him in a Rush Duel. During the Duel, Yuga stated that he didn't believe Kan to be someone who would exploit dinosaurs, and Kaseki agreed, suggesting that they find Gossie after all. But when Hunt suggested they check the construction site where Gossie was rumored to have first appeared, Yuga abruptly tried to stop them from looking, though Luke eagerly joined forces with the Dueling and Dinosaur Research Club. Yuga defeated Kan, but the group decided to check the construction site anyway, only to learn that "Gossie" had been nothing more than heating pipes and a noise produced by one of Yuga's "Roads", much to Kaseki's anger. To make it up to them, Yuga brought the Dueling and Dinosaur Research Club to where the Relic had been, and Hunt sneezed, uncovering seven previously unseen symbols carved in the floor. Yuga had Kaseki and his friends help him analyze the symbols, and they deduced from them overlapping that they formed the logo of Seven Hells Hall. Yuga theorized that the Relic would appear there on the next full moon, and he was invited to the location for a RoaRomin concert.
The Relic appeared at the Seven Hells Hall as Yuga had predicted, during his Duel with Roa Kirishima, and Kaseki, Kan and Hunt immediately entered the room to examine the Relic, though they retreated into the audience when it began to project Otes. Otes explained he had chosen Yuga to become the King of Duels at the 666th Goha Dueling Tournament and cleared up the legality of "Sevens Road Magician", which he had given to Yuga at the event and whose legality had been in question due to Roa's actions. Yuga and Roa continued their Duel with the right to the title on the line, and Roa pushed Yuga into a corner, but Yuga was able to defeat Roa, and the Relic retreated into the ground after the Duel.
Some time after Yuga and Roa's Duel, Kaseki received a penalty on his Duel Disk while he was at a dig with Kan and Hunt. They went to the Road Laboratory, where Yuga explained that they and all his other friends had been penalized due to his challenge by Goha Duel Overseer Nail Saionji to retrieve the data of Kaizo, and if anyone in Yuga's group of friends lost a Duel, they would all be penalized and their accounts deleted if they received six penalties. The penalty had occurred when Mimi Atachi was defeated by her son Yoshio, as Mimi had inadvertently become considered one of Yuga's friends. Despite the circumstances, everyone present agreed to help Yuga, given that all of their accounts were on the line, but then Yuga, Luke and Gakuto were dropped into a pit leading to the Garden of Providence, with Romin and Menzaburo Oomori also falling in.
Kaseki later received four more penalties on his Duel Disk. Kaseki was at a dig with Kan and Hunt when they watched Yuga and Nail's Maximum Monsters, "Super Magitek Deity Magnum Over Road" and "Yggdrago the Heavenly Emperor Dragon Tree" battling. After being forced to return his Maximum to his Deck, Yuga was pushed into a corner and reminded of the stakes of the match, which reminded Kaseki that his account would be deleted if Yuga lost the Rush Duel due to his five penalties. He was overjoyed when Yuga was able to re-Maximum Summon "Magnum Over Road" again and when Yuga defeated Nail, who erased the penalties on Kaseki's Duel Disk after the Rush Duel.
Goha 6th Elementary
Kaseki, Kan and Hunt came to the Rush Duel Training Camp with Menzaburo, Sushiko, Nick, and the Dueling Insects Club from Goha 5th Elementary. That night Yuga told them about his encounter with Asana Mutsuba, who Kan deduced was likely from Goha 6th Elementary's Heavy Cavalry Duel Club, and Kaseki and Hunt told Yuga, Luke and Gakuto about their previous issues with them. They were then interrupted by Romin and Sushiko fighting over the remote, and Kaseki, Kan and Hunt wisely sidled away until the matter was over, but they returned when Nick had finished cooking.
Team Battle Royal
After the Rush Duel Training Camp, Hunt wound up mixed up in the battles between Goha 7th Elementary and the Heavy Cavalry Duel Club and he learned about Maximum Mountain, a mine owned by the Mutsuba family containing prototype Duel Disks whose Duel ID cards could be converted into Maximum Monsters. Kaseki and Kan helped Hunt sell the Maximum Monsters to other children, though they only ever sold one at a time to prevent other children from obtaining a full Maximum. As a result, Hunt became far more wealthy and he bought new research and excavation equipment for Kaseki and Kan, rising higher than them in social standing.  Kaseki, Hunt and Kan entered the Goha Rush Duel Team Battle Royal as Team Excavate Treasure HUNTers and due to their Maximums they quickly rose to third in the competition.
Kaseki, Hunt and Kan visited the Tahayasty Restaurant where the six members of the first and second-ranked teams, Yuga, Roa, Nail, Luke, Romin and Gakuto were breaking and Hunt challenged Yuga to a Duel as they weren't confident they would be able to defeat Nail's own Maximum and weren't as experienced with Roa's Deck. Kaseki and Kan bore Hunt on a golden throne during the Duel until Hunt Maximum Summoned "Great Imperial Dinocarriage Dynarmix" and failed to defeat Yuga. Intimidated by Luke's fury over Hunt having a Maximum, Kaseki and Kan broke down and confessed what they had done to Yuga and his friends, much to Hunt's disgust. To Kaseki's surprise, Yuga revealed that he had obtained a Maximum of his own from two cards he'd collected from Hunt's sales and one that Asana had given him, and he Maximum Summoned and defeated Hunt with "Hyper Engine Vast Vulcan". After the Duel Kaseki, Kan and Hunt apologized for their actions and when they were asked whether money or Dueling was more important, Kaseki and Kan joyfully declared that Dueling was, drowning out Hunt's statement that money still was. Luke then tried to confiscate their Maximums, but Kan admitted that they'd sold them all and Hunt revealed the deal that he'd made with Goha 66.
Despite their efforts, Kaseki, Kan, and Hunt failed to place in the tournament, so they attended the finals of the Goha Rush Duel Team Battle Royal on the third day, watching Romin's victory against Roa and Gakuto's Duel against Nail, where Kaseki was shocked by Gakuto's new "Gakuting" persona. Faced with "Yggdrago the Heavenly Emperor Dragon Tree", Gakuto eventually returned to his normal persona and forced a DRAW, leaving Yuga and Luke to have a final Duel.
|20 unknown Duelists||45||Win (with Hunt Goto and Kan Hakubutsu)|
- Yu-Gi-Oh! SEVENS episode 9: "Wonderful Jurassic"
- Yu-Gi-Oh! SEVENS episode 13: "Another King"
- Yu-Gi-Oh! SEVENS episode 20: "It's Tough Being an Adult"
- Yu-Gi-Oh! SEVENS episode 21: "Close Encounters of the Noodle Kind"
- Yu-Gi-Oh! SEVENS episode 24: "Resolve"
- Yu-Gi-Oh! SEVENS episode 26: "Maximum Duel!"
- Yu-Gi-Oh! SEVENS episode 28: "Training Camp! Sushi Duel"
- Yu-Gi-Oh! SEVENS episode 45: "Upstart Hunter"
- Yu-Gi-Oh! SEVENS episode 43: "Opening! Team Battle Royal"
- Yu-Gi-Oh! SEVENS episode 49: "RoaRomin"
- Yu-Gi-Oh! SEVENS episode 50: "Gakuting"