Niko Kazao is a recurring supporting character in the anime series SANDA. She is a second-year student at Daikoku Welfare Academy and is designated as the fiancée of the protagonist, Kazushige Sanda, under a national policy that mandates marriage partners in a future where children are scarce. She has long brown hair and brown eyes, and is typically seen in a school uniform with suspenders and a tie, often with her hair in braids. Her personality is bold and pragmatic; she is described as a character who freely chases danger and taboo, acting with a sense of urgency before she becomes what society considers a proper adult. This fearless approach leaves a striking impression on those around her. In the story, Niko Kazao serves as a supporting figure whose relationship with Kazushige Sanda is central to her role, though her motivations and personal development are closely tied to navigating the expectations placed upon her. No notable supernatural or combat abilities are associated with her character.