Nanase Yui is a 13 year old girl who attends as a student at Noble Academy, her dream is to become a picture book author. At some point in time, she found out that her roommate Haruka and her friends were Princess Precure. Friendly and very helpful to the extent that she can, Yui is described by Towa as "the sun for Pretty Cure", in that her kindness and hope is what reminds them on what is truly important. Even if she can't become a Cure herself, she knows she can still make a difference.