Extra (エクストラ) was one of the excellent idols, and was 15 years old.
Her real name was Kaidou Etsuko (海堂悦子).
She was an ojousama idol who played the piano.
Her blood type was O.
Extra was born on March 18.
She is 162 cm tall (but her high heels are 8 cm).
She won't say how much she weighs.
Extra says, "You want to know my three sizes?
It's perfect. I don't have to tell you."
Extra's hobby is to listen to music.