Hailey Anne, also called Misora Inaho, is an 11-year-old Springdale elementary student whose life shifts when she discovers a Yo-kai Watch U prototype at an anime shop, believing it to be a futuristic space gadget. This accidental find thrusts her into partnership with Usapyon, a lunar rabbit-like Yo-kai, launching her dual role as a detective bridging human and Yo-kai worlds. Together, they establish the Hapyon Detective Agency, which pauses operations after Phantom Thief Kopin’s demise but later revives to continue aiding both realms. Driven by an obsessive love for space, sci-fi, and anime—especially the series *Sailor Cuties*—she views mundane life through a lens of interstellar drama, often amusingly clashing with Usapyon’s pragmatic nature. Her scatterbrained tendencies and fleeting focus sometimes disrupt those around her, yet her relentless curiosity fuels inventive mystery-solving and fierce loyalty to allies. Central to her journey is reconstructing a rocket for Usapyon’s guilt-ridden ally, Dr. Hughly, showcasing her technical ingenuity and compassion. Her upgraded Yo-kai Watch U-2 deepens her supernatural collaborations, while her dynamic with Nate Adams weaves rivalry and camaraderie—racing head-to-head in one episode, then uniting against foes like the Ghoulfather in *Yo-kai Watch 3*. Their clashes melt into teamwork, balancing competition with mutual growth. Hailey confronts supernatural trials, including temporary possession by the Yo-kai Ponderoo, thwarted by Nate’s aid, and navigates family life with her inquisitive younger brother Joshua. School interactions feature Jessica Stonewood, her steadfast friend, and Isabel, a refined classmate whose sporadic Yo-kai-induced crushes add playful tension. Her wardrobe mirrors her eclectic spirit: a blue-and-yellow skirt ensemble, winter gear with pink tights, and festive costumes like a Santa suit. In *Yo-kai Watch 3*, she strategizes grid battles, leads treasure hunts across the Cluvian Continent, and co-manages interdimensional crises alongside Nate. Though later franchise entries limit her to brief appearances, her core arcs highlight comedic misadventures maturing into leadership—guiding her agency with budding responsibility while clinging to her cosmic obsessions and unshakable bond with Usapyon.