Harmonie is a senior in high school at the start of the series, and she goes by she/her. Harmonie is friends with both Pixy and Bonnie as she is a member of their trio. Pixy and Harmonie have a closer connection and often always butt heads with each other, in an attempt to one up the other. The two are both related by marriage, and the two always knew each other since they were children. In the series, Harmonie is described as being humorous, ambitious, and flamboyant.