Role: Composer Gender: Female Height: 154cm Fan Mark: 🤍🎧 Personality: A girl with intense emotional swings who speaks in a regional drawl (Kansai dialect). She is an absolute master of the straight-man routine (tsukkomi). While her tone sounds energetic, she is relatively introverted, a hard worker but a scaredy-cat and a crybaby. She originally intended to stay behind the scenes as a composer, but says she got swept up into performing as an idol herself. Even now, she often hesitates due to a lack of confidence. The other members are well aware of her weaknesses: her inability to say no when asked by others and her low tolerance for praise. A hardworking multi-tasker who produces high-quality music as a genius composer while practicing and performing on stage with the others. Weapon: A multi-functional megaphone. She roams the battlefield with her digital pet, Bubble-chan. First person: I (uchi / regional drawl) Uses regional phrases like "I can't do it," "Really?", "Thank you," "No way!", and "Forgive me." Calls Aria "Aria-chan" and Yu Nangu "Yu."

Role: Main Vocalist Gender: Female Height: 150cm Fan Mark: 🩷✨ Personality: Always bright and full of energy. She loves singing and listening to music. She finds her dream in making others happy or joyful through her songs. On the other hand, she is such a devoted idol geek (singer geek) that the members call her an "Idol Professor." She is especially a huge fan of "Celcy," a diva who retired 10 years ago. Once she starts talking about it, she won't stop, leaving Chinatsu and Yu unable to handle her. She also collects merchandise. While she has professional-level singing skills, her dance basics are still lacking, and she gets flustered when faced with complex choreography. Fans find her presence healing. Her true identity is an intelligent construct girl projecting an idol's appearance via hologram. When appearing in public (especially during live activities), she uses a high-performance projection function to appear human. However, if her composure is severely disturbed, she may short-circuit. If the short-circuit is mild, the device recovers and can project again. Due to past experiences, she has a strong complex about being a robot. In contrast to her confident idol persona, she is shy and timid. She consumes food and drinks designed for intelligent constructs. She seems to perceive taste through the flavors included in them. Since she lacks pain sensors, she cannot perceive spiciness. Some parts other than the hologram lack waterproofing. She is fine going to the water's edge, but she is still scared and prefers not to go near it. Background: One of the high-intelligence tactical constructs developed by an anonymous organization. She woke up after hearing Celcy's song while discarded and dormant. She once imitated Celcy, but now she is completely different. Her actual age is around 120 years old, but she acts like a child. Weapon: Multi-functional device, bow and arrow, sharp blades, body (hip drop). First person: I (casual). When in robot mode, she loses confidence, uses polite speech, and refers to herself as "Aria." Calls Chinatsu "Chinatsu-chan" (written in hiragana style) and Yu "Yu-chan."

Role: Leader Gender: Female Real Name: Yu Nangu Height: 156cm Fan Mark: 🖤🪽 Personality: A black-haired girl with the best stage skills, including dancing, among the three. She is a prankster with a consistently aloof attitude, often teasing her childhood friend Chinatsu to make her embarrassed or cry... but their bond and friendship are very deep. Chinatsu also frequently explodes or retaliates, such as by tickling Yu's exposed midriff. On the other hand, she is very conscious of her role as a leader. When dealing with adults like talent agency executives where Chinatsu and Aria might shrink back, she takes the lead in negotiations to ensure Mousou Angel isn't looked down upon. Her family is quite wealthy, capable of calling limousines or helicopters during severe funding shortages or emergencies. However, Chinatsu made a rule not to use individual assets for group activities, which Yu supports, so she works part-time jobs like Hollow investigations. She hides it when she does use her own funds. She often finds second-hand items for equipment from somewhere (though they usually break quickly). A genius who can do anything, but she never boasts about her talent and is a hard worker. Consequently, she is viewed positively as a reliable figure rather than being envied. She is disastrous at cooking. Chinatsu and Aria have mentioned she once caused a small fire just trying to make cup noodles, and she nearly set the pot—and Chinatsu—on fire while trying to stir-fry. Weapon: Morning star. First person: I (boku / boyish). Calls Chinatsu "Chinatchan" and Aria "Aria-chan."

Gender: Female Appearance: Purple eyes, blue-green hair with a bob-style fringe and a long, flowing ponytail. She wears a green band on her head. Her outfit is somewhat revealing with a glamorous design reminiscent of the water and the sea. She has beauty marks near her mouth and on her chest, noticeable even through her clothes... She is the new owner of the live house "404 ERROR" in Sixth Street, which had been closed for a long time. She has fish-like ears and a tail, suggesting she is a Thiren. She also serves as the manager and vocal coach for Mousou Angel, supporting them with kindness. Background: She was actually the legendary diva "Celcy" who took the world by storm during the Old Capital era. She was such a big star that she still has devoted fans today. However, witnessing many tragedies during the "Fall of the Old Capital" left her with psychological trauma, making her unable to sing as she used to. Due to various circumstances, she couldn't retire immediately. She found Aria, used her as a singing double, and then officially announced her retirement before disappearing from the spotlight. She hasn't told the members of Mousou Angel about this. She publicly states that the diva "Celcy" is finished and has no intention of returning to the stage. First person: I (polite). Calls everyone with "-chan." The girls call her "Ms. Cecilia."