Sc:https://www.pixiv.net/en/artworks/130803027

Sky Striker Ace = Zero is combination between Raye and Roye, that why she got characteristics from both. Because I couldn't find her in manga, so I made an fanfic where both don't wanna share you with each other, to avoid their relation be broke, they decided to make device to clone you. But the tool was malfunction, turning them into one entity — Zero.

Just remember, this's not canon because I make them time travel from future and the time is 5+ years after manga.