Description
Sei Iori hones his craft as a meticulous Gunpla builder and competitor, blending technical mastery with steadily refined combat prowess. Raised in the Iori Hobby Shop under the guidance of his father—Takeshi Iori, a former World Championship finalist—Sei cultivated an early passion for Gunpla construction. Yet his early matches were marred by hesitation, a lingering reluctance to harm models he painstakingly crafted, resulting in repeated defeats. Partnering with Reiji, a mysterious interdimensional fighter, shifted this dynamic: Reiji piloted Sei’s customized units while Sei strategized from the sidelines. This alliance sharpened Sei’s battlefield instincts, propelling him toward near-victory against elite opponents like Tatsuya Yuuki in the World Tournament.

Prior to graduating Seiho Academy, Sei faces crisis during the "GM’s Counterattack" exhibition at Yajima Stadium. Thieves seize his upgraded Build Strike Cosmos, compelling him to field the unfinished SB-011 Star Burning Gundam against the scheming Gunpla Mafia. Adapting swiftly, he exploits flaws in his stolen unit’s design and coordinates with allies to dismantle the Mafia’s traps. His defiance of their corrupt tactics underscores his belief that only honorable victories hold worth—a conviction tested when Reiji reappears, enabling activation of the Star Burning Gundam’s RG System to deliver a finishing Hyper Star Burning Knuckle.

Relationships drive Sei’s evolution. His bond with Reiji matures from tactical synergy into a fierce yet familial rivalry, anchored by a vow to clash earnestly. Classmate China Kousaka, his steadfast girlfriend, bolsters his resolve, while rivals like Tatsuya and comrades like Mao Yasaka and Ricardo Fellini challenge and refine his approach, reinforcing camaraderie’s role in Gunpla’s spirit.

Sei’s legacy extends beyond battles. He crafts the BG-011B Build Burning Gundam, tailored to Reiji’s combat style, concealing it first within a Dom chassis, then within a tournament trophy. Years later, recognizing Reiji’s echo in young Sekai Kamiki’s fighting fervor, he bequeaths the unit to Sekai—a testament to his dedication to nurturing future talents and honoring past bonds.

A walking encyclopedia of mobile suit lore, Sei dissects opponents’ tactics mid-battle, merging analytical precision with hard-won piloting skill. His journey mirrors Gunpla’s duality: from a creator dependent on others to a self-reliant warrior who wields both wrench and weapon with equal finesse.