Moro exists as one of two artificial beings operating within Yūko Ichihara’s wish-granting shop, alongside her counterpart Maru. She presents as a young girl with pink eyes and short, straight pink hair featuring two curls on either side of her head. Her attire consistently reflects an "angelic" aesthetic, contrasting with Maru’s darker style, and includes seasonal variations: a medium-length pink dress with a red ribbon and bloomers for winter, and a shorter pink miniskirt-style dress for summer. She owns an unworn orange kimono due to her permanent confinement within the shop premises. Personality-wise, Moro exhibits notable immaturity and a whiny demeanor, often complaining about work duties. During games or tasks, she cheats if facing loss, triggering arguments with Maru. Despite frequent squabbles, they share a close bond, frequently dancing together or holding hands. They typically speak in unison, echoing Yūko’s statements or acting as her "yes-men," and display strong attachment to Kimihiro Watanuki—whom they initially guide into the shop and frequently assist or hug during his tenure. Functionally, Moro and Maru sustain the shop’s existence and visibility to clients, expending substantial energy that requires long recovery naps. As artificial constructs, they lack souls and internal organs but demonstrate sentience and human-like emotions—experiencing happiness, sadness (crying for hours), and sensitivity to temperature. Though never explicitly shown eating, evidence like sweet bean crumbs on Moro’s face implies consumption capability. They possess no hygienic needs but engage in activities like reading magazines and listening to soft rock music. A key limitation is their inability to read or write beyond signing their own names, though they comprehend text. After Yūko Ichihara’s disappearance, Moro and Maru transfer loyalty to Watanuki upon his assumption of shop ownership. They initially express profound grief over Yūko’s absence, crying and seeking comfort from Watanuki, who reassures them. Subsequently, they adapt to support Watanuki’s management, aiding in tasks like setting up altars for spiritual endeavors. Their existence remains irrevocably tied to the shop; they cannot leave its grounds and will cease to exist only if the shop is abandoned.