Annaka Haruna is a Class 1-Q student at Tokisadame Highschool, sharing the classroom with Yuuko Aioi, Mio Naganohara, Mai Minakami, and Nano Shinonome. Her appearance is defined by blonde hair consistently paired with a prominent red ribbon, serving as her signature charm point. She retains this accessory despite occasional school objections, diffusing conflicts with light humor. Outside school, she wears plain, casual attire. Her personality blends a bright, cheerful demeanor with frequent speechless bewilderment when encountering strange incidents. This tendency to become easily flustered by absurd or impossible demands earned her the fan nickname "Eh-chan." She displays a compliant nature, often accepting confusing instructions while visibly overwhelmed—such as drawing hair on a bald head with a marker. Annaka primarily appears in isolated comedic vignettes reacting to bizarre commands and surreal encounters across Tokisadame, both at school and in her neighborhood. Key recurring gags include interactions with Takasaki-sensei and Nakanojou, notably when instructed to draw Nakanojou’s hair after an accidental haircut. Neighborhood encounters often involve surreal characters or situations that leave her dumbfounded. Additional trivia notes her rifle proficiency demonstrated in Episode 12. Her surname "Annaka" combines the characters for "peace, quiet" (安) and "middle" (中), while "Haruna" derives from "hazelnut, filbert" (榛) and "name, noted, distinguished, reputation" (名). She subscribes to the Tenkawa Newspaper, and a real-life train station—Annaka-Haruna Station in Annaka City—shares her full name.