The heroine of the franchise "Elemental Symphony of Vogalchevalier", Selesia confronts the mysterious Altair; until Souta Mizushino enters her world and she is forced to protect him. Shortly afterwards, Selesia is thrown into Souta's world, where Souta reveals she is in fact a fictional character. Coming to terms with her situation, Selesia agrees to help Souta find the other Created so they can find a way to return to their world and stop Altair's plans. Her Creator is Takashi Matsubara.
(Source: Re:Creators Wikia)