TV-Series
Description
Gammon Sakanoue, a Root Academy freshman and self-proclaimed rival to Kaito Daimon, fuels his competitive drive with a desire to dominate in puzzle-solving. His spiky red hair, leather jacket, and motorcycle project a delinquent image, belying a sharp intellect that earns him the moniker "Galileo." A dual talent as both Solver and Giver, he crafts puzzles under the alias "Chidousetsu" for magazine commissions, driven by financial necessity to support his younger sister, Miharu, whom he cooks for and fiercely protects. This secret side hustle later becomes a tool for the POG to recruit him.

His rivalry with Kaito erupts in fiery clashes, peppered with mocking nicknames like "Bakaito," yet threaded with reluctant admiration. Gammon’s analytical mind dissects Kaito’s errors mid-puzzle, adapting strategies with cold precision. Even his comedic attempts to win Nonoha Itou’s favor—including cross-dressing contests—hint at unspoken affection, though his obsession with surpassing Kaito remains central.

Season 2 fractures Gammon’s resolve as Kaito’s Orpheus Bangle-enhanced skills outpace him. Lured by POG’s Himekawa Elena and tested by Bishop, he embraces a colder persona, openly antagonizing Kaito with lethal puzzles. Though branded a traitor, his true allegiance stays shrouded—POG leaders doubt his loyalty, while his near-fatal schemes against Kaito mask a desperate bid to validate his own prowess.

By Season 3, Gammon plunges into the Orpheus Order’s consciousness-transfer conspiracy, collaborating with figures like Rook and Freecell. A staged "Disney Death" during their counterplot underscores his role in high-risk gambits. Beneath his rebellious exterior, lingering loyalty to allies and Miharu complicates his villainous veneer, framing him as a morally fluid strategist navigating loyalty and ambition.

Balancing slapstick antics—clashes with Nonoha, flamboyant disguises—against grim arcs of betrayal, Gammon’s duality defines him. His Solver-Giver expertise and knack for spotting unconventional solutions cement his tactical reputation, yet internal struggles gnaw at his confidence: measuring his worth against Kaito’s genius, wrestling with the ethics of puzzle-solving’s deadly potential. This tension between swaggering bravado and vulnerability carves him as a dynamic foil, propelling narrative stakes while unmasking the fragility beneath his cunning.