TV-Series
Description
Momoko Shirai attends junior high school alongside the main characters, consistently depicted as the childhood friend of Chizuru Sarashina. She affectionately refers to Chizuru as "Chi" and demonstrates fierce, unwavering loyalty and protectiveness toward her, sometimes crossing into possessiveness. Momoko reacts with visible annoyance or anger when others interact closely with Chizuru, interpreting these moments as threats to their exclusive bond. This devotion drives her to defend Chizuru unconditionally, regardless of fault.

She navigates relationships through a rigid, black-and-white perspective, allowing little room for nuance or compromise. This outlook fuels her frequent, sharp conflicts with Saori Chiba, whom she actively dislikes due to Saori's perceived disrespect toward Chizuru and generally aloof demeanor. Their clashes highlight Momoko's combative nature and quick temper when provoked, especially concerning Chizuru. She maintains a distinct "us versus them" mentality, reinforcing her role as Chizuru's primary defender.

Momoko's identity and actions remain inextricably linked to her relationship with Chizuru. The narrative does not develop her individually, leaving her personal background, family life, and interests outside this connection unexplored. Her function centers on group dynamics, particularly her antagonism toward Saori and her dedication to staying close to Chizuru. Official media provides no details about her life before junior high school or beyond this period.

Her physical appearance features black hair styled with blunt bangs and cut to neck length, black eyes, and the standard female junior high uniform, often accessorized with a ribbon. She is portrayed during her transition from childhood to adolescence.

Momoko's story unfolds entirely within her junior high years across the original manga and anime adaptation. Subsequent seasons, movies, OVAs, or spin-offs do not develop her character further, explore her background, or alter her relationships and personality, as the provided information indicates no such extensions.