Nina is a seven-year-old London schoolgirl pivotal to disappearances and memory-manipulation mysteries. She possesses blonde hair, blue eyes, and wears a short-sleeved pink dress with a red brooch, layered over long white-and-dark-green striped sleeves, red socks, and white shoes.

Oswald Whistler abducted her for her compatibility as a host, using the Detragon machine to implant his deceased daughter Melina's consciousness into her mind. This forced fusion triggered temporary surges of Melina's memories and personality within Nina, sparking an internal battle for mental control.

Despite the violation, Nina's innate consciousness endured. She gradually resisted and suppressed Melina's identity until the foreign memories faded completely, reclaiming sole command of her mind and body—a testament to her resilience.

After the Ambrosia incident concluded with Whistler and Jean Descole's defeat, Nina reunited safely with her parents. Her family owns a cat bearing near-identical resemblance to Claudia, a feline belonging to Lady Dahlia.

Nina's ordeal embodies a coerced psychological invasion and her subsequent recovery, culminating in her return to familial normalcy.