Rumiko Chie is the homeroom teacher at Hinamizawa Branch School, teaching multiple age groups in one classroom. Her design—blue hair, blue eyes, a plain white dress with a red ribbon and green jewel—parodies Ciel from *Tsukihime*, created with explicit permission from TYPE-MOON. She habitually carries a notebook and tends a curry garden behind the school. Chie displays a kindhearted, gentle, and altruistic nature, prioritizing student welfare and earning trust from children and villagers. This contrasts sharply with her intense fury when curry is insulted, stemming from an obsession that includes researching curry history in India, eating curry for every meal, and violently defending its honor, earning her the nickname "Curry Demon." Her dislike of spaghetti may reference a controversial change to Ciel's preferences in the *Tsukihime* anime. Her background involves relocating to Hinamizawa during the dam conflict, disregarding board of education protests. She taught at a villager-established school in a repurposed forestry building, which later gained government recognition through the influence of the Three Families. She resides in Okinomiya. Across arcs, Chie shows consistent dedication to her students. In *Tatarigoroshi-hen*, she reacts aggressively when Keiichi Maebara disparages curry during a punishment game. She intervenes in Satoko Houjou's abusive situation by contacting child protective services, though initial investigations prove inconclusive due to Satoko's denials and past history of fabricated abuse claims; Chie later observes Satoko's mental breakdowns at school. Her involvement deepens in *Minagoroshi-hen*, where she initially supports protests against Satoko's uncle Teppei but temporarily withdraws due to pressure from the Three Families, who influence the school's operation. After Keiichi rallies community support, Chie recommits, assisting in the protest that leads to Teppei's arrest. In *Tsumihoroboshi-hen*, she unwittingly becomes part of Rena Ryuuguu's paranoid delusions, with Rena misinterpreting gardeners as Oryou Sonozaki's enforcers; Chie later becomes a hostage during Rena's school siege. Chie typically dies during the Great Hinamizawa Disaster. Exceptions include *Meakashi-hen*, where epilogue credits indicate her survival and relocation to Tokyo by 2004, and *Matsuribayashi-hen*, where she survives the disaster and introduces Hanyuu Furude as a new student. She also appears in *Higurashi Gou*'s *Watadamashi-hen* and *Tataridamashi-hen*, hosting curry competitions and supporting protests against Teppei. A scrapped concept for *Nekodamashi-hen* involved her becoming deranged and harming Rika, discarded due to her guest character status. In spin-offs, *Higurashi Rei*'s *Saikoroshi-hen* depicts an alternate-world Chie behaving nearly identically, though she addresses Satoko more formally due to Satoshi's presence. *Higurashi Jan* features her as a main character, and *Higurashi Daybreak* includes an outfit referencing Ciel's black dress. Comedic portrayals like in *Hajisarashi-hen* show her wielding T-squares like Ciel's "Black Keys" swords. Her full name may form a pun ("Chieru Miko"), alluding to Ciel's church affiliation.