Miyuki Irie is the drummer of Girls Dead Monster, the diversionary band within the Afterlife Battlefront. She has a slim figure of average height with long lavender hair and purple eyes, and she wears the standard SSS uniform along with a black band on her right thigh bearing the letters GDM. Irie is a shy and timid girl who, despite being deceased herself, is frightened by stories about ghosts and spirits, a trait that her best friend Sekine often exploits for amusement. She is fond of ghost stories in principle but cannot handle them in practice. Irie enjoys spending time with Sekine and joined Girls Dead Monster at the same time as her. Her primary role in the story is to provide musical cover during SSS missions, using her drumming to help the band draw attention away from the group's operations. Her personality is gentle and somewhat innocent, and she appears to find joy in simple experiences. While she remains a supporting character with no major personal arc, her close friendship with Sekine and her participation in the band define her presence in the series.