Mea Uchifuji is a high school student and schoolmate of Nana Sunohara. She possesses black hair cut shoulder-length, with bangs typically covering most of her right eye, and distinctive crimson eyes. Her given name Mea combines the characters for "strawberry" (苺) and "love, affection" (愛), while her surname Uchifuji means "inside, within" (内) and "wisteria" (藤).

Mea exhibits a perverted personality, characterized by an obsessive attraction toward younger boys, notably Aki Shiina—a trait she shares with her friend Maiko Osonoi. She stands out by correctly identifying Aki as male upon their first meeting, unlike others who mistake him for a girl. Her interactions frequently involve teasing Aki or expressing interest in him, often fueling comedic situations within the series.

Driven by stated affection for children and experience caring for her younger siblings, Mea aspires to become a kindergarten teacher. However, during a childcare training session with Aki, Matsuri Shiina, and Ayaka Sunohara, she later privately admits to Maiko that ulterior motives related to her attraction to young boys might also influence this career choice, revealing self-awareness about the conflict between her goals and desires.

Appearing primarily in group settings alongside other schoolmates, Mea functions as a minor character. The documented media provides no background story, family details beyond mention of siblings, or significant character development for her.