Akina's younger sister. She is in her third year of junior high. She has a weak body and has been in and out of the hospital many times.

She is the owner of the Seventh Fated card, the Fated One of Time card. While wearing a mask, she acted to achieve her goals. She came from three years in the future to save her brother. She exists as a separate person from Hikari of the current timeline, and takes the name Erika Myoujou.