Eichi Tenshouin commands influence as both idol and CEO, steering the unit "fine" under STARMAKER PRODUCTION, an agency he founded. Born into privilege yet confined by chronic illness during his youth, his isolation fostered a worldview shaped by televised idols—icons of perseverance he aspired to emulate. This vision crystallized into a mission to transform idol culture into a global force, ensuring its longevity through strategic innovation. As Yumenosaki Academy’s student council president, he orchestrated sweeping reforms via "The War," a calculated campaign to dismantle complacency by overthrowing the Five Eccentrics, nonconformist idols he deemed obstacles to progress. His uncompromising tactics, driven by a mortality-conscious urgency to spare others his hardships, earned him the epithet "Emperor"—a nod to his authoritarian precision and indelible legacy. Eichi’s leadership merges cold pragmatism with performative elegance, valuing outcomes over emotional nuance. Yet beneath his manipulative exterior lies a paradoxical care for his circle’s welfare. His dynamic with Wataru Hibiki, "fine" collaborator and erstwhile rival, epitomizes this duality: a bond forged from envy into mutual reliance, blending competition with fragile trust. This relationship catalyzed Eichi’s introspection, challenging his insecurities and reshaping his governance. Interactions with peers further illuminate his complexity. He mentors Tori Himemiya with protective zeal, leverages Yuzuru Fushimi’s steadfast devotion, and engages in tense camaraderie with Hiyori Tomoe, their mirrored cunning underscoring a mutual recognition of ambition. Strategic alliances, like his pact with Ibara Saegusa of COSMIC PRODUCTION, showcase his ability to harness rival strengths for industry-wide evolution. Chronic frailty punctuates his narrative, hospital visits juxtaposed against performances lauded for ethereal grace. Offstage, media-forged social quirks manifest in theatrical banter and refined hobbies—collecting porcelain teacups, ballroom dance—interspersed with flashes of whimsy that defy his regal facade. Post-academia, Eichi’s trajectory reveals gradual metamorphosis. Once a tyrant, he adopts measured reflection, upholding ideals while conceding past excesses. Initiatives like Ensemble Square mark his enduring dedication to idol culture’s advancement, now tempered by collaborative nuance. Former adversaries transition into reluctant allies, mirroring his shift from autocratic schemer to a leader embracing reciprocity—a testament to growth etched in pragmatism’s uneasy truce with empathy.