Ryer Von Eltiana commands the Seraphim special forces unit as a lieutenant aboard the space station Watcher's Nest. Holding the third rank in the command hierarchy, she reports directly to Commander Wolfgang Woerns and Lieutenant Commander Jean Luc LeBlanc. Her primary duty involves supervising the training of probationary pilots Misaki Kureha, Kiri Marialate, Suzanna Bluestein, and Luxandra Frail. Personally driven to marry before turning thirty, she grows concerned about her prospects as that age approaches. Despite her leadership role, she actively avoids administrative tasks, preferring direct combat missions. Strong-willed yet flawed, she possesses a weakness for alcoholic cocktails, a habit monitored by her accompanying android unit, Kotoko, to prevent excess. After the Ghoul-related temporal collapse of Watcher's Nest, Ryer spearheads investigations into anomalies across divergent timelines. She leads missions into pivotal Earth events: feudal Japan in 1594 and a pre-World War II coup attempt in 1936. During these operations, spectral manifestations of Misaki Kureha challenge her grasp of reality and causality. Her character intensifies as she confronts the psychological toll of repeated time travel and the consequences of altering history. Following the station's destruction, she coordinates the search for displaced personnel across fragmented timelines. Decades later, as a lieutenant commander in 2327 commanding a long-duration interstellar voyage, she uncovers evidence of Misaki's survival. This leads to an emotional reunion, resolving her long-standing grief over the cadet's apparent loss. Ryer evolves from a disciplined, protocol-focused commander into a figure deeply marked by loss and temporal dislocation, ultimately fueled by the hope of recovering her comrades. Her persistence culminates in restoring connections with those displaced through time, including her reunion with Misaki.