Despite the fact that Reiko is an extremely forgetful and absent-minded girl (perhaps a result of the shock from the divorce of her parents), she is an extremely talented pianist who discovered her Gate of Illusion when Invaders attacked her during her very first public recital at a theater. Her ability to create illusions while playing music does not go unnoticed by Invaders, who suffer intense agony when they hear her melodies. She is the only Gate Keeper other than Shun Ukiya who has operated the prototype Unit 00 Gate Robo, and the only one to pilot a jet aircraft. But, individually, she utilizes any keyboard musical instrument as a weapon (like a melodica). Her Gate color is pink.