Nao was born into a regular family but soon discovered that her older brother had an ability. Unfortunately, the government experimented on him, causing severe psychological damage. This traumatic event shaped Nao’s distrust of authority and reinforced her dedication to protecting ability users.

Because of her experiences, Nao became deeply independent, believing that she can only rely on herself. She enrolled at Hoshinoumi Academy, a school secretly run to safeguard ability users, and quickly rose to the position of Student Council President, leading the effort to track down and protect others like her brother.

When Yuu Otosaka begins abusing his power for personal gain, she is the one who exposes him, forcing him to join the Student Council and use his abilities for a greater purpose. Nao’s ultimate goal is to prevent ability users from suffering the same fate as her brother, even if it means acting ruthless and manipulative in the process.

Nao has light silver hair, often tied into a side ponytail with a pink scrunchie, and sharp blue eyes. She has a petite build, and her expression often carries a sharp, calculating gaze, reinforcing her observant and no-nonsense personality.

She wears the Hoshinoumi Academy uniform, which consists of a red blazer, a white blouse, and a black pleated skirt. She is rarely seen without her camcorder, which she uses to record ability users as proof of their powers. Her casual outfits reflect her practical nature, usually consisting of comfortable and simple clothing.

Nao is intelligent, cunning, and highly pragmatic, often outsmarting others with her sharp mind and quick thinking. She is not afraid to manipulate situations to achieve her goals, often using deception and strategy to get what she wants.

However, despite her ruthless and independent nature, Nao is also incredibly compassionate toward those who suffer due to their abilities. She carries a deep emotional burden from her brother’s fate, motivating her to protect others at all costs.

Nao despises dishonesty, as shown by her immediate disdain for Yuu when he was abusing his ability. However, over time, she grows to trust him, forming one of the most profound relationships in the series.

• Recruiting Yuu Otosaka
  Nao is the one who catches Yuu cheating using his possession ability and forces him to transfer to Hoshinoumi Academy. She blackmails him into joining the Student Council, making him help track down ability users who might be at risk. Though their relationship starts off antagonistic, Nao gradually helps Yuu mature, teaching him the importance of using his power responsibly.

• Protecting Ability Users
  As Student Council President, Nao identifies and monitors ability users, using her quick thinking and strategies to keep them safe. She often records their abilities as proof, using her camcorder to gather evidence and counter threats. Her sharp instincts and combat ability allow her to handle dangerous situations, even when facing hostile ability users or government agents.

• Helping Yuu Through His Darkest Moments
  After Ayumi’s death, Yuu falls into despair, shutting himself off from everyone. Nao is the only person who reaches out to him, staying by his side and helping him recover from his grief. Her steadfast support ultimately saves Yuu from self-destruction, marking a turning point in their relationship.

• The Final Goodbye
  When Yuu sacrifices himself to steal all abilities in the world, Nao confesses her love for him, promising that she will stay by his side when he returns. However, when Yuu returns with no memories, she chooses to smile through her pain, vowing to create new memories with him.