Souma Ogata is a popular high school student and classmate of Mamoru Suzuhara. He occupies a position as one of the more popular students in his class, frequently becoming the center of attention and noted for his popularity with girls. This outgoing nature contrasts sharply with Mamoru's introverted personality, whom Souma considers a perfectionist due to his diligent study habits. Souma expresses admiration for this trait, wishing he could match such dedication.

His background includes a significant middle school turning point when he transferred schools after experiencing bullying. This history remained concealed until the group's seven-day stay at the abandoned Satomi Coal Factory. During their seclusion, identities and secrets were spilled online, revealing Souma's past. It became public that upon entering high school, he adopted an extroverted and lively personality, potentially as a defense mechanism against further bullying. Some peers perceived this behavior as inauthentic or "put on".

Souma participates in the week-long hideout at the factory, initially joining Aya Chiyono and others to celebrate her birthday before her move to Tokyo. This experience proves pivotal for his development. Confined with previously distant classmates, he forges closer bonds, particularly bridging the gap with the once-isolated Mamoru, whom he now calls a friend. His view of Hiroto Honjou shifts dramatically; initially seeing him only as academically focused, Souma gains deep respect after witnessing Hiroto's actions during their seclusion, especially his key role in rescuing the group. This newfound respect leads Souma to later invite Hiroto to play baseball together.