Elda-Freya comes from the anime Chobits
Freya is the older chobi and Elda is her younger <kinda> twin sister
They are persocoms... Human-computer.... the legendary one
Later, Freya bear lots of sadness that made her stop and Elda keep Freya's memory inside her after she volounteer to
Later, Hideki found Elda <known as Chii later> but her memory with Freya are all erased as it is her last wish before hideki found her