TV-Series
Description
Gakuto Sōgetsu is a lean boy with deep-blue eyes and purple hair partially covering his eyes, secured by two white hairclips on the left side. He wears a plain light-blue school uniform featuring a chest pocket, a collar symbol, and black shoes. For formal occasions, he switches to a blue kimono with a black and light-blue waist pattern, complemented by a regal black and red cloak edged in yellow.

As student council president at Goha 7th Elementary, Gakuto maintains a perfect attendance record, arriving daily at precisely 6:66:66 am. His disciplined routine includes jogging and calligraphy practice. Deeply committed to enforcing rules, he reacts with irritation or agitation when others, particularly Yuga Ohdo, break them. This commitment clashes with his enjoyment of Rush Duels and camaraderie with Yuga and Luke, leading him into rule-breaking activities that cause him significant distress and prompt frantic pleas to Goha Corporation for forgiveness to protect his record.

He struggles to balance presidential duties with personal enjoyment and finds it difficult to decline student requests, often overcommitting to tasks like teaching math or filling sports team vacancies. This overcommitment sometimes causes him to inadvertently break rules while focused on fulfilling obligations. His honorable nature is demonstrated when he steps down as president after losing a duel to Yuga, honoring a pre-duel agreement. He wins reinstatement by a landslide in the subsequent emergency election, reflecting his charisma and peer approval. Gakuto occasionally makes bad puns and is severely tone-deaf, especially evident during singing attempts.

His abilities include comically fast walking while maintaining an upright posture, useful for retrieving items like Yuga’s Duel Bicycle. He is athletic, capable of dodging rugby players while simultaneously handling student inquiries. He witnesses Yuga’s creation of Rush Duels and assists by powering Yuga’s Duel Disk via bicycle. Later, he explains Rush Duel rules to classmates during Yuga and Luke’s duel.

Gakuto employs a control-oriented deck centered on "Fiendish Commander Yameruler," which blocks opponent Tribute Summons of high-Level monsters. His stall tactics leverage monsters with high DEF values. For offense, he uses "Shield & Sword" to temporarily swap his monsters' ATK and DEF, attacking aggressively before switching them back to Defense Position or removing them to avoid retaliation. Key spells and traps include "Bowing of the Graying Gauze Guild" and "Refined Rulers - The Three Fiendish Commanders".

He is assisted by the Nanahoshi twins, Ranze and Rinnosuke, whose family has served his for generations as ninja. They enforce discipline alongside him and support him during duels. Ranze develops a crush on Yuga, leading to observational journals and occasional delusional behavior, while Rinnosuke remains more grounded. Their loyalty faces a test when Ranze briefly leaves to serve Nail Saionji after dueling Gakuto, though she later returns.