Kei is the legendary trainer for Prism Shows. Her methods, however, are very cruel. She forces a person to throw away their heart in order to perform the Aurora Rising. She is very cold towards her daughter, Kyoko, but has an understanding with her son, Jun, who can tell when a star has been born. She has been married at least twice, since Kyoko and Jun are her children, but have different fathers. She lives in a remote, European-style mansion by herself.