Ryota Sekiguchi, a Summoned Otherworlder and student of Freedom Academy’s Class S, balances timid restraint with explosive aggression when threatened. His middle-school stature features neck-length black hair, dark eyes, and the academy’s standard uniform. Rescued from an unnamed nation by Yuuki Kagurazaka, he was entrusted to Shizue Izawa’s care, where he discovered his lifespan was collapsing under rampant magicule energy. After Shizue’s exit, Class S rebuffed instructors until Rimuru Tempest took charge. A spar with Rimuru triggered Ryota’s berserker skill, promptly quelled by the new teacher. To stabilize the class’s volatile magicules, Rimuru led them to Ramiris’ Dungeon. At the Dwelling of the Elementals, Ryota’s prayer at an altar summoned lesser water and wind elementals, which Rimuru fused into a dual-element greater spirit. This bond tempered Ryota’s magicules, granting him longevity. During Tiss-supervised field training, the group repelled thieves but clashed with a Phantom Commanding officer—a crisis averted by Noir, a Primordial repaying a debt to Shizue. Post-Rimuru’s exit, Tiss became Class S’s permanent instructor. Ryota later joined classmates at Tempest’s festival, uncovering Rimuru’s slime identity and forging a bond with Hinata. He witnessed martial arts tournaments and shared communal feasts, immersing in the culture. His journey traces a youth grappling with lethal magicules to finding equilibrium through spirit symbiosis, bolstered by alliances with mentors and peers. Training trials and Tempest’s cultural exchanges mark his gradual assimilation into this world’s fabric.