Airi Eniwa is a 15-year-old high school student and aspiring voice actress affiliated with the talent production company AiRBLUE, specifically as a member of its sub-unit AiRBLUE Bird. She possesses black hair, cyan eyes, and stands 1.50 meters tall, with blood type A. Her birthday is March 14, making her the youngest member of AiRBLUE, slightly younger than her fellow first-year unit member Yuuki Tendou. This birthdate positions her among the youngest students in her grade under Japan's academic calendar running from April to March.

The name "Eniwa" (恵庭) combines "favor, benefit" (恵) and "courtyard, garden, yard" (庭). "Airi" (あいり) is typically written in hiragana without inherent meaning; potential kanji interpretations include 愛莉 ("love, affection" and "white jasmine") or 愛梨 ("love, affection" and "pear"). Airi exhibits a shy and timid personality, often struggling with self-confidence during performance activities like idol training. She perceives herself as unlucky and frequently relies on good luck charms, a habit that sometimes hinders her synchronization with group members. Her reserved nature contrasts with fellow unit members like Yuuki Tendou, creating interpersonal dynamics addressed through bonding and collaborative efforts.

The narrative emphasis centers on her role within the unit and interactions during specific projects, such as idol initiatives depicting her challenges and gradual adaptation through group support.