Sato is a Hope's Peak Academy Reserve Course Student and a good friend of Mahiru Koizumi. She is a key subject in the Twilight Syndrome Murder Case featured in Danganronpa 2: Goodbye Despair and later featured in Danganronpa 3: The End of Hope's Peak High School. She is a heavily possessive and defensive person who would do anything to protect her friends, especially Mahiru Koizumi, from being hurt. She has a tendency to act like a leader with her friends, and she is very decisive and unwavering in her thoughts. She also appears to hve a short temper.