Kotoko-02 is an upgraded android support unit assigned to Lieutenant Lyar Von Ertiana, developed after her predecessor Kotoko-01 suffered near-total destruction in combat. This iteration features a reconstructed body with a more mature appearance, undefined in age classification, characterized by pink hair, blue eyes, and a height of 148 cm. She retains partial memories and personality profiles from Kotoko-01, ensuring immediate rapport and seamless collaboration with Lyar. Her core programming prioritizes loyalty and combat support but remains vulnerable to external reprogramming. Primary functions include computer system interfacing, marksmanship, and piloting specialized Rampart Armors. Operationally, Kotoko-02 engages in time-travel missions against ghoul incursions across historical periods. She participates in events like the Toyotomi Hideyoshi assassination attempt in feudal Japan and the 1936 Japanese coup, countering ghoul invasions emerging from quantum anomalies during timeline alterations or overlapping realities. Her capabilities prove critical in barrier containment of ghoul entities and supporting temporal displacements affecting Watcher's Nest personnel. Her development arc involves adapting to technological upgrades while preserving her foundational dynamic with Lyar. Routine programming updates maintain functionality and safeguard memory integrity, reinforcing their partnership during missions.