Yuga Ohdo, an eleven-year-old student at Goha 7th Elementary, possesses an inventive mind and a passion for creating novel dueling experiences. His flame-like auburn and yellow hair, green eyes, red jacket with white shoulders, white shirt featuring yellow designs, blue fingerless gloves, and blue shoes with red details are distinctive. Yuga blends intelligence and enthusiasm with a rebellious streak against rigid systems, particularly Goha Corporation's strict dueling rules. This drives his creation of "Roads," inventions designed to increase life's enjoyment. Though creative, his Roads frequently encounter practical issues. He values others' happiness above personal acclaim, notably ceding the title of "King of Duels" to his friend Luke Kallister. Yuga exhibits nervousness in high-pressure duels and holds specific fears, including ladybugs and an inability to swim. His surname "Ohdo" (王道), meaning "king's road" or "path," directly inspires his naming of inventions as "Roads."

His technical expertise encompasses programming and mechanical tinkering, demonstrated by modifications to Duel Disks and creations like the "Duel Bike." His most significant Road is Rush Dueling, a faster format allowing unlimited Normal Summons and hand refills, conceived to challenge Goha Corporation's control. Early attempts to install these rules incurred five penalties from Goha drones, risking permanent account suspension. A pivotal moment occurred when Luke Kallister, drawn to Yuga's goals, guided him to a monument tied to the "King of Duels" legend. There, Yuga dueled the enigmatic Otes; his victory successfully established Rush Dueling as a legitimate format, attracting allies like Romin Kassidy and Gavin Sogetsu while drawing opposition from Goha, including Nail Saionji who sought to erase Rush Duels.

Yuga terms all his inventions "Roads." These include Kaizo (a modified Goha drone with variable functions), the Duel Bike, conceptual dueling robots, specialized tools like a lie detector suspended from a fishing rod and hairstyling capsules, the Duel Guitar (initially a noise-canceling device modified for Romin Kassidy after he recognized her appreciation for it), rotating chairs for a restaurant, and mannequins linked to human movement.

His deck centers on Spellcaster monsters optimized for Rush Duels, emphasizing field swarming and graveyard utilization to empower his ace monster, "Sevens Road Magician," which gains 300 ATK per unique Attribute in his Graveyard. He employs cards that recycle resources or support multi-Attribute strategies, deliberately emptying his hand each turn to leverage Rush Dueling’s five-card draw rule. He maintains a spare deck for lending. Key duels encompass early losses to Luke and Romin Kassidy, victories against Goha executives like Nail Saionji and Asana Mutsuba, and a climactic space duel against Otes, who sought to eradicate dueling. After defeating Otes, Yuga vanished for two years. In the sequel "Yu-Gi-Oh! GO RUSH!!," he reappears in the past, recreating Rush Duels there without altering his original timeline. His duel record features wins, losses, and draws across both series, including a draw against Damamu/Yuhi Ohdo and losses to Phaser Ryugu and Yuhi Ohdo.

Yuga is the youngest protagonist in the franchise and the only preteen lead. He shares traits with predecessors: Yugi Mutou's ace monster (a Level 7 DARK Spellcaster), Jaden Yuki and Yuma Tsukumo's optimism, Yusei Fudo's engineering skills, Yuya Sakaki's role in pioneering new rules, and Yusaku Fujiki's programming prowess. Unlike them, he possesses no supernatural abilities or dark past, relying solely on ingenuity. He is the first protagonist since Jaden Yuki to meet his successor (Yudias Velgear in "GO RUSH!!").