Ritsuko Shinko / Fandom

The following are information regarding unofficial depiction of the character Ritsuko Shinko in fan works.

Band members theory
Since the latter is based on the former, CaraPrincess said that it would be amazing for them to be paired as band members, especially as percussionists for an idol unit in PriPara, PriChan or Aikatsu! series. In this kind of relationshipping, Raiko and Ritsuko is commonly depiected as having an admiration towards each other's abilities, and decided to help each other in their performances. In other words, Raiko's ability to make anything follow a rhythm makes Ritsuko's ability (somewhat) less dangerous, while that Ritsuko's ability to manipulate emotions using drum beats makes Raiko feels more confident in her work and makes her work harder and helps her bring the "emotion" of the song straight into the rhythm.

Subject to Mettaton's romantic relationships (combination of Touhou and Undertale relationshipping)
Due to their rebellious fashion styles, CaraPrincess said that they could be a common target for Mettaton's crazy romantic relationships, which involves excessive rave parties and karaoke performances. She also stated that Mettaton also is amazed by their abilities, and offers them a position in his band in exchange for their admiration and romantic love for him. Raiko and Ritsuko are usually depicted as being very easily attracted to handsome men due to they are accustomed with the modern, so they became subjects to his crazy love relationships. Also, both due to ther star signs (Raiko is assigned the star sign Aries by CaraPrincess due to being the inspiration for Ritsuko (who is of the same star sign) and her personality; Mettaton is assigned the star sign Leo by CaraPrincess in the Undertale Star Sign Personality Test created by her), the reason for such relationshipping is obvious.