Natsumi Suga, a university student employed at her uncle Keisuke Suga’s modest editing studio, sports long brown hair tied in a ponytail, striking purple eyes, and lengthy eyelashes. Her casual wardrobe emphasizes exposed arms and legs, accented by colorful nail polish and wristbands. Born circa 2001 as the daughter of Keisuke’s older brother—a former government financial official—she grew estranged from her father by 2021, partly due to perceived favoritism toward her uncle, prompting her relocation to Keisuke’s home. Though specifics of their discord remain unclear, their familial tension persists. Beneath her carefree, mischievous demeanor lies loyalty and kindness. She playfully teases peers like Hodaka Morishima, whom she catches gazing at her chest, yet exhibits sincere compassion. Her fascination with urban legends and supernatural phenomena drives her to investigate tales like the "Sunshine Girl," a figure said to manipulate weather at personal sacrifice—a pursuit contrasting Keisuke’s profit-focused ethos. Risking legal repercussions, she aids Hodaka in his search for Hina Amano, the Sunshine Girl, even transporting him via motorcycle during a police pursuit before her eventual capture. This boldness mirrors Katsuhiko Teshigawara’s (*Your Name.*) penchant for perilous loyalty. By 2024, she remains closely bonded to Keisuke, Nagi Amano, and Moka Suga, evidenced in shared group photos that underscore her enduring familial ties. Her name reflects thematic layers: "Suga" merges "necessity" (須) and "joy" (賀), while "Natsumi" blends "summer" (夏) and "beauty" (美), encapsulating her vibrant identity.