Nene, the youngest princess co-ruling Genes, possesses blonde hair and blue eyes (occasionally cited as green). Despite being twelve, she displays an incongruously mature, curvaceous figure. Her personality is that of a spoiled, bratty princess, often self-centered and amused by pranks played on others. She exhibits a restless, energetic nature, craving action and excitement, becoming easily bored without stimulation. This impulsiveness drives her to actively seek confrontations, especially after giant robot attacks target the kingdom.

In combat, Nene utilizes a specialized powered suit designed by her sister Kana. This suit grants flight, superhuman strength, and near-invulnerability, classifying her as a "Flying Brick" fighter. However, using it amplifies her existing ego and recklessness, making her overconfident and prone to taunting opponents. Although aspiring to be a heroic defender, her effectiveness is limited; she frequently ends up defeated or requiring rescue, making only a minor contribution in the climactic battle against the primary antagonist, fitting a "Faux Action Girl" role.

Nene's combat attire and general wardrobe consistently emphasize fan service elements. Her standard outfit features an extremely short skirt ensuring frequent panty shots, while her powered suit includes a cleavage-revealing design; these elements remain prominent during action sequences and transformation scenes.

Her relationships with her sisters highlight defiance; she routinely ignores their authority and dismisses their safety or behavior concerns. Character development across the series is minimal, with Nene largely retaining her initial personality traits by the conclusion, though her underlying intentions remain positive despite her brash exterior.