RAHXEPHON INTERLUDE: HER AND HERSELF/THATNESS AND THERENESS

Quon Kisaragi was surprised when she saw an illusion of herself floating in midair. This other "self" of her claimed that she is a fragment of Quon. Thus an existentialistic dialogue began between the two. (Source: Anime News Network) OVA side story bundled with the RahXephon Special Edition game for the Sony PlayStation 2. — Description from AniList community (anilist.co).