Risa has short brown hair and has orange eyes. She wears a Hakuou uniform during school. While not in school, she is usually seen wearing modern clothing. She is often seen dressed in a Miko outfit while at her family's Shinto shrine.
Risa's firsts appearance was when Hayate entered Hakuou Academy for the first time to deliver Nagi's lunch. She also appeared again when Hayate came to take Nagi's notebook at night. She is usually seen with Miki and Izumi, but she usually has less screen time than the others, although she is present in multiple scenes like when Hayate returned Miki to her house, when Hayate and Ayumu were searching for Hinagiku's present, and during Hinagiku's birthday. After becoming a 2nd year student, she was there during the hike at Mt. Takao along with her friends. She later makes an appearance to give Ayumu a chance to go to the Aegean sea. During Golden Week, Risa, Miki, Izumi, Hinagiku, and Ayumu traveled to Turkey and later went to Mykonos in order to meet Hayate, Nagi, and Maria. After Golden Week, she hasn't had many appearances.