A jonin from the Ninja Village. She has a habit of giving people nicknames and speaking casually even to new acquaintances, which can make her come off as somewhat frivolous. Sato once revered Kotaro as a mentor and studied ninjutsu under his guidance, unaware that his techniques were from the Nue Clan, as there were no public records of such a clan in the village. Her feelings of admiration and respect eventually developed into a small crush, which she now dismisses as youthful folly. These days, she views Kotaro as a troublesome older brother, often lecturing him for his recklessness following the events in the Ninja Village. Meanwhile, Sato notices that Yuzuriha—her best friend who's always been like a sister—seems to be looking at her with an increasingly passionate gaze, which she hopes is just her imagination.