Ninotchka, whose full name is Nina Mikhailovna Pavlova, is an officer in the Solar System Area station of the space police organization ēlDLIVE, specifically assigned to the Criminal Investigation Department's Division 5. She is a young woman with very long black hair and pink eyes. Her nickname, Ninotchka, is a diminutive form of Nina and is the name by which she is most commonly known.

Her personality is gentle, polite, and kind-hearted. She has good manners and is often described by others, including her colleague Chūta Kokonose, as an angelic figure. Unlike her more abrasive partner, Veronica Borowczyk, Ninotchka is approachable and tries to maintain a calm, friendly demeanor even in tense situations. She frequently acts as a mediator, gently chiding Veronica when the latter is too harsh with others. However, she is also notably shy and modest: when she activates her SPH (Space Pheromone) ability, her body is covered only by minimal undergarments, and she deeply dislikes the revealing nature of this combat state. To hide as much of herself as possible during battles, she keeps her hair long.

Ninotchka joined ēlDLIVE around the same time as Misuzu Sonokata and Veronica Borowczyk, and she forms a close working partnership with Veronica. Despite their contrasting temperaments, the two cooperate effectively on missions. She interacts warmly with other officers, including Chūta, and is generally supportive of her colleagues. Her motivations as an officer stem from a genuine desire to protect others and uphold law and order, though she maintains a modest and unassuming attitude about her role.

In terms of abilities, Ninotchka wields SPH, a power unique to aliens that manifests as a special combat form. When she uses it, she gains enhanced physical capabilities but is left in a nearly nude state, which she finds embarrassing. She copes with this by using her long hair as partial coverage. Her fighting style likely complements Veronica's more aggressive approach, though specific techniques are not extensively detailed. Over the course of the story, she remains a steady and reliable presence, showing quiet growth in confidence as she continues to serve alongside her friends. Key relationships include her bond with Veronica, her camaraderie with Misuzu, and her amicable connection with Chūta. She also maintains a respectful rapport with other members of the Solar System station. Her development is subtle, centered on her growing comfort with her duties and her ability to overcome personal embarrassment for the sake of her mission.