Rika is translator for the Japanese team in their trip to Paris. She was already a fan of Tsubasa whom she met at the airport. Her father works at the Japanese Embassy. Rika grew up in Europe and speaks several languages. Since she introduced herself to the Japanese team in France, it is likely that she masters French as well as the Japanese language. Rika seems to have a slight crush on Tsubasa, at least enough to make his actual love interest Sanae Nakazawa jealous. She does hug Tsubasa and give him a kiss on the cheek in the second film, but nothing else comes from it.