|School||Goha #2 Elementary|
|Anime debut||Yu-Gi-Oh! SEVENS episode 0099: "Dino Detours"|
Trench, known as Kaseki Hotta (
Trench 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.
Trench is a friendly individual, and despite not being the president of the Duel Dinosaur 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.
Trench's first name in the Japanese version, Kaseki, is the Japanese word for "fossil", befitting his passion.
Birth of Rush Duels
After hearing about the appearance of Gossie in Goha City, Trench, Tracker and Diggs decided to search for it and use it to create their own Jurassic Duel World. After stopping at the Ramen Hut, they encountered Yuga Ohdo, Lucidien "Luke" Kallister, Romin Kassidy and Gavin Sogetsu, who were also looking for Gossie using Yuga's modified Goha Enterprises Drone Kaizo. Trench introduced the Duel Dinosaur 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. Trench, Tracker and Diggs 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, Gavin and Romin. Despite the group's treachery, Yuga was still willing to tell them where the Relic was if Diggs could defeat him in a Rush Duel. During the Duel, Yuga stated that he didn't believe Diggs to be someone who would exploit dinosaurs, and Trench agreed, suggesting that they find Gossie after all. But when Tracker 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 Duel Dinosaur Club. Yuga defeated Diggs, 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 Trench's anger. To make it up to them, Yuga brought the Duel Dinosaur Club to where the Relic had been, and Tracker sneezed, uncovering seven previously unseen symbols carved in the floor. Yuga had Trench and his friends help him analyze the symbols, and they deduced from them overlapping that they formed the logo of Big Seven Arena. 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 Big Seven Arena as Yuga had predicted, during his Duel with Roa Kassidy, and Trench, Diggs and Tracker 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, Trench received a penalty on his Duel Disk while he was at a dig with Diggs and Tracker. 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 Imimi was defeated by her son Yosh, 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 Gavin were dropped into a pit leading to the Garden of Curiosity, with Romin and Saburamen also falling in.
Trench later received four more penalties on his Duel Disk. Trench was at a dig with Diggs and Tracker when they watched Yuga and Nail's Maximum Monsters, "Supreme Machine Magnum Overlord" and "Yggdrago the Sky Emperor" 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 Trench 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 Overlord" again and when Yuga defeated Nail, who erased the penalties on Trench's Duel Disk after the Rush Duel.
Goha #6 Elementary
Trench, Diggs and Tracker came to the Rush Duel Training Camp with Saburamen, Sushiko, Briscoe, and the Dueling Insects Club from Goha #5 Elementary. That night Yuga told them about his encounter with Asana Mutsuba, who Diggs deduced was likely from Goha #6 Elementary's Heavy Cavalry Duel Club, and Trench and Tracker told Yuga, Luke and Gavin about their previous issues with them. They were then interrupted by Romin and Sushiko fighting over the remote, and Trench, Diggs and Tracker wisely sidled away until the matter was over, but they returned when Briscoe had finished cooking.
Team Battle Royal
After the Rush Duel Training Camp, Tracker wound up mixed up in the battles between Goha #7 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. Trench and Diggs helped Tracker 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, Tracker became far more wealthy and he bought new research and excavation equipment for Trench and Diggs, rising higher than them in social standing. Trench, Tracker and Diggs 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.
Trench, Tracker and Diggs visited the Ramen Hut where the six members of the first and second-ranked teams, Yuga, Roa, Nail, Luke, Romin and Gavin were breaking and Tracker 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. Trench and Diggs bore Tracker on a golden throne during the Duel until Tracker Maximum Summoned "Great Imperial Dinocarriage Dynarmix" and failed to defeat Yuga. Intimidated by Luke's fury over Tracker having a Maximum, Trench and Diggs broke down and confessed what they had done to Yuga and his friends, much to Tracker's disgust. To Trench's surprise, Yuga revealed that he had obtained a Maximum of his own from two cards he'd collected from Tracker's sales and one that Asana had given him, and he Maximum Summoned and defeated Tracker with "Hyper Engine Vast Vulcan". After the Duel Trench, Diggs and Tracker apologized for their actions and when they were asked whether money or Dueling was more important, Trench and Diggs joyfully declared that Dueling was, drowning out Tracker's statement that money still was. Luke then tried to confiscate their Maximums, but Diggs admitted that they'd sold them all and Tracker revealed the deal that he'd made with Goha 66.
Despite their efforts, Trench, Diggs, and Tracker 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 Gavin's Duel against Nail, where Trench was shocked by Gavin's new "Gakuting" persona. Faced with "Yggdrago the Sky Emperor", Gavin eventually returned to his normal persona after a power outage in the stadium and forced a DRAW, leaving Yuga and Luke to have a final Duel.
Trench watched Yuga and Luke's Rush Duel, where the power in the stadium began to fail again, revealed to be due to the Goha Duel Server being hacked, and Trench witnessed the revelation of the Goha Duel Server on the moon and the Rush Duel Program contained within, under attack by Goha Enterprises Drones that were uninstalling it and had been all tournament. Despite knowing their Duel would complete the uninstallation, Yuga and Luke continued to Duel, Trench and his friends shocked by the crowd's support for their Duel. Trench applauded when Luke eventually won, resulting in the uninstallation of Rush Dueling, but Yuga and Nail were able to reinstall the program and install it in the Super Rush Robot to protect it from another attack. Trench then watched Luke's coronation as King of Duels.
Goha 6 Siblings
The true Goha Presidents, the Goha Siblings, returned to Earth, evicted the current president, Mimi Imimi, and challenged Yuga and his friends to Rush Duels with the Super Rush Robot held hostage by Forced Gymnastics Armaments that would shake it apart unless Yuga defeated the six siblings. Trench was in Goha City one night with Diggs, Tracker, Saburamen, Sushiko, Briscoe and the Space Operations Duel Squadron when he watched the Rush Duel between Yuga and The☆Lukeman, including Yuo Goha's rage after he believed Yuga and The☆Lukeman weren't taking the Duel seriously. To Diggs's shock a meteor entered the atmosphere and plunged towards Yuga, having been dragged in by the Goha Meteor Shower, and Yuga blocked the meteor with his Duel Disk, acquiring the "Fusion" card contained within it and using it to defeat The☆Lukeman, saving the Super Rush Robot.
|20 unknown Duelists||45||Win (with Tracker and Professor Diggs)|
- Yu-Gi-Oh! SEVENS episode 0099: "Dino Detours"
- Yu-Gi-Oh! SEVENS episode 01313: "The Chosen One"
- Yu-Gi-Oh! SEVENS episode 02020: "What Makes a Hero a Hero?"
- Yu-Gi-Oh! SEVENS episode 02121: "A Taste of Space"
- Yu-Gi-Oh! SEVENS episode 02424: "Helping a Friend"
- Yu-Gi-Oh! SEVENS episode 02626: "The Final Nail"
- Yu-Gi-Oh! SEVENS episode 02828: "Training Camp! Sushi Duel"
- Yu-Gi-Oh! SEVENS episode 04545: "Upstart Hunter"
- Yu-Gi-Oh! SEVENS episode 04343: "Opening! Team Battle Royal"
- Yu-Gi-Oh! SEVENS episode 04949: "RoaRomin"
- Yu-Gi-Oh! SEVENS episode 05050: "Gakuting"
- Yu-Gi-Oh! SEVENS episode 05151: "Road vs. Daor"
- Yu-Gi-Oh! SEVENS episode 05252: "The Final Rush Duel"
- Yu-Gi-Oh! SEVENS episode 05454: "Riding Rush Duel!"
- Yu-Gi-Oh! SEVENS episode 06767: "Space Warrior The☆Lukeman"
- Yu-Gi-Oh! SEVENS episode 07272: "The Fantastic Underground Luke Factory"