Usui Mio

 (碓氷みお), also known as Hime de Bab (姫でバブ), is a soloist and a former member of Epinesta and Kore:ct. She graduated from Kore:ct on August 26, 2019 and graduated from Espinesta on July 25, 2020.

She was formerly known as Hitoma Ichigo (人間一号) while in Kore:ct.