|Sudou Mio須藤 美緒|
|Hair||, Green, Long, Ponytail, Sidehair|
|Clothes||, Apron, Maid's Dress|
|Role||, Classmate, Class President, Full Sister, High School Student|
|Engages in (Sexual)||, Not Sexually Involved|
|Visual novels||Side character - Imouto ga Boku o Neratteru|
|Voiced by||Mizukiri Keito|
Mio is a second grade high school student and classmate of the protagonist. She is a class president and a serious and meddlesome person. She is Keita's close friend and Tomoka's senior at her workplace.