23 years old. A guard at the Suzumiya Prison.
She became a prison guard right after graduating collage. She is very proud of her work (helping the society by watching over criminals, help criminals convert and fit into society when they are released). A rule-oriented person, she cannot stand slackers or people who defy regulations.
She has a lot of respect for Masato, because he took on a lot of responsibility and continued to work hard when the prison is having hardships. She also has feelings for Masato.