Run Elsie Jewelria is a childhood friend of Lala and the girl version of Ren Elsie Jewelria. As Run and Ren are royalty from planet Memorze, they can change gender in mind and body upon triggering a specific stimulus; in their case, a sneeze. Ren hates Rito, especially after he accidentally kissed him, but Run fell in love with Rito because of that kiss, which caused Ren to further dislike Rito. In To-Love-Ru Darkness Chapter 9 or To Love-Ru Darkness Episode 6, Run and Ren permanently separated into two separate beings after reaching 'adulthood'.