Ena Asto is the princess of the Runan Empire and daughter to the king and queen of Runa. She is first introduced in volume 5 of the DYD novels and episode 13 of the LoLH anime. In both the light novel and the anime, she speaks briefly when Miran Froaude visits the Runa Palace. However, because women are not allowed to be involved in politics according to the Runan religion, Ena's role is very limited overall even if it was slightly extended in the novel.