This is a term used to refer to a young girl that Fuutarou Uesugi encountered during the Kyoto school trip five years prior to the main story. She has made several appearances in Fuutarou's numerous recollections in the series. She can also be referred to as the Girl in the Photograph.
She is one of the Nakano quintuplets. However, due to the quintuplets' identical physical appearance at the time, it can be said that Fuutarou encountered more than one of the quintuplets.
- "I'm gonna set an example for everyone!" - Young Nakano