Eishirō Sugata, a tall, composed figure with white hair and blue-green eyes, presides over the New World Discovery Club at Sorami High School. Clad in his school uniform and rectangular glasses, he dedicates himself to unraveling the enigmatic "New World" and the Angeloids of Synapse. His scientific endeavors blend glider construction and methodical experimentation, frequently drawing parallels to historic explorers like Magellan and Columbus. Born into a political dynasty, Sugata’s trajectory shifted irrevocably when his older brother perished in a glider accident. Consumed by guilt for overlooking a mechanical flaw, he was disowned, displacing his younger brother Yuugo as heir. This tragedy propelled his obsessive quest for the New World—a symbolic path to redemption. Eccentricities define his daily life: a riverside tent serves as his home, while his stoic exterior occasionally cracks to reveal dry wit or quiet empathy, particularly toward Angeloids such as Nymph and Astraea. Strategically adept and combat-proficient, Sugata rivals childhood friend Mikako Satsukitane, a yakuza scion, in both intellect and skill. Allying with Synapse’s Daedalus, he probes the truths of Angeloids and celestial realms. The Chaos Arc highlights his contempt for the destructive Angeloid Chaos, while the Hiyori Kazane Arc sees his inquiry into her identity culminate in memory loss following her demise. During the End Arc, he infiltrates Synapse to reprogram the Rule Obelisk, sacrificing himself only to be resurrected via Tomoki Sakurai’s wish. In the OVA *Project Pink*, Sugata guides Nymph through emotional turmoil, urging her toward self-determination. Here, his experimental glider achieves its maiden successful flight—a tangible milestone in his odyssey. Spin-offs like *Yūryō Bukken Mō Dame Sō* later depict him contacting Yuugo to dissect Synapse’s secrets, underscoring his enduring role in cosmic exploration. Sugata’s evolution intertwines atonement, empowerment of Angeloids, and a duality of analytical precision and compassion. His journey—marked by resilience, vulnerability, and unyielding resolve—positions him as a linchpin bridging humanity and the divine.