The Re:Zero anime is based on the light novel series written by Tappei Nagatsuki and illustrated by Shin'ichirō Ōtsuka. The series began as a web novel and was later acquired by Media Factory ...

While fans know that Emilia from Re:Zero is much older than she seems in the anime, not many fans questioned her real age until Regulus Corneas remembered her right before he drowned to his death.