Birthday: September 27

School: Seisho Music Academy

Class: 99

Student number: 1

Likes: Lazing about, Baths after practice

Dislikes: Stretching

Favorite food: Umeboshi

Least favorite food: Green peas

Karen Aijou is the protagonist of the Shoujo☆Kageki Revue Starlight franchise. She is a second-year student from the Actor Training Department at Seisho Music Academy's 99th Graduating Class.

Set out on the road to becoming a Stage Girl after being captivated by a performance of "Starlight" she saw as a child. Always boisterous and cheerful, but hates early morning lessons. She joins the mysterious Revue with Hikari, who crossed fates with her when they were young girls.