Movie
Description
Miki Hosokawa attends Dōmori Elementary School as a member of Class 5-3. Originally the class's most notorious troublemaker, her talkative personality fuels a penchant for spreading rumors. She possesses a notably curvaceous figure for her age, proudly emphasizing her bust size which evolves from a B-cup to an F-cup throughout the series. Her appearance features neck-length blonde hair—rendered grey in the 2025 anime adaptation—with bangs covering her eyebrows, a black headband, and blue eyes.

A confrontation with a tattletale yōkai, which held her accountable for malicious gossip and tried to devour her, drastically curbed her rumor-mongering. This incident redirected her focus to studying spirits and yōkai, amassing such extensive expertise that her teacher Nube sometimes seeks her insights. However, her research often serves ulterior motives like harvesting rumors or chasing quick wealth through supernatural methods. She spiritually develops the rokurokubi ability, enabling covert astral projection by elongating her head and neck. Though Nube temporarily stripped this power, she reclaimed it through training and applies it ingeniously—such as stretching beyond a mandrake’s lethal scream range to evade harm.

Her classmate dynamics reveal complex layers: she irritates Meisuke Nueno through tattling or cheating yet shows genuine concern in peril and admires his Demon Hand. She deems Hiroshi Tateno a best friend, deploying seductive charm against him and pranking him in astral form. With Kyōko Inaba, she shares a rivalry-friendship blend, mocking Kyōko’s smaller bust while vying for Hiroshi’s attention. She approaches Shuichi Shirato mainly for food, exploits Izuna Hazuki’s fox spirit to cheat on exams, and uses allure on Katsuya Kimura—though she bit him when he touched her head mid-rokurokubi. Her interactions with Noriko Nakajima carry jealousy but overall neutrality.

Etymologically, her given name Miki merges "beautiful" (美) and "tree" (樹), while Hosokawa combines "fine" (細) and "river" (川). She stands among three confirmed former students of Nube’s class to acquire spiritual powers. Her signature exclamation is "Unbelievable!"