OVA
Description
Chiri Kitsu, a student in class 2-He, exhibits a methodical and precise nature, demanding strict conformity, equality, and proper execution in all matters. This fixation manifests in her appearance, notably her hair parted exactly down the middle; despite its natural curly texture, she strives to keep it perfectly straight. Her name derives from the Japanese word "kitchiri" (きっちり), meaning "precisely," reflecting this core personality trait.

Frequent school transfers marked her childhood, leading to loneliness and difficulty forming friendships due to the constant expectation of moving again. During this period, Harumi became her only significant childhood friend after reaching out to her during isolation. Their shared activities provided moments of security, yet their relationship remained complicated as they never formally acknowledged being friends, partly because Harumi never found the right timing to confirm it. Chiri also experienced disturbing hallucinations and paranoia from a young age, contributing to her social isolation and the development of unsettling delusions.

Her personality extends into pronounced obsessive-compulsive tendencies. She becomes deeply agitated by minor imperfections or deviations from strict categories, attempting to force variability into rigid conformity—often with counterproductive results. This leads to illogical choices, such as preferring worse but matching grades over better mismatched ones. When her demands for order are challenged or things are not done correctly, she exhibits extreme, violent reactions. She frequently resorts to physical violence, wielding weapons like knives, razors (sometimes concealed), and most characteristically, a shovel—connecting to a name pun, as the kanji for "Chiri" forms the first character of "umeru" (埋める), meaning "to bury." Her violent rampages include threats, torture, stabbings, and sometimes fatal attacks, primarily targeting her teacher, Nozomu Itoshiki, making her a wanted fugitive at times. She possesses extensive knowledge of violent historical revolutions and purges and harbors ambitions of conquering Japan and the world through bloody insurrection.

She occasionally displays psychic abilities or occult connections, notably manifesting a third eye on her forehead—relating to another name pun, as the kanji for "Chiri" forms part of "senrigan" (千里眼), meaning "clairvoyance." She also practices ushi no toki mairi (a curse ritual) and finds inexplicable uses for raw meat.

Following an accidental incident where she shared an infirmary cot with Nozomu Itoshiki, she developed a persistent fixation on marrying him. Her pursuit is forceful and commanding, escalating to extreme measures like contemplating the elimination of the rest of humanity to achieve her goal. Rejection by him or sensing romantic competition from other students typically triggers immediate and severe vengeful responses. Despite often cordial baseline interactions with classmates, her violent proclivities inspire fear and deference, leading others to mistakenly call her the class representative—a position she does not officially hold. She has an older sister named Tane Kitsu.