She has short, brown hair and round black eyes. She has a fair skin complexion.
Rika is a playful girl. When she goes out with boys, she compulsively asks them to buy expensive stuff for her. She has some interest in the occult, but is easily scared and quick to get away when something mysterious happens.
She and Miho are mostly seen together, along with Sakura. She sometimes gets involved in occult activities, and she and Miho tend to run away in fear, whenever they encounter a strange phenomenon, without Sakura who stays unafraid.
Her first brush with the occult comes when she inherits a haunted phone number that has been floating around for years, and it gets fixed by Rinne who had just started to attend class and suggest making use of the instrument shelter at Sankai High.
She fell victim of a Damashigami having the appearance of a salesman, who offers mechanical pencils which make its user smarter. Once she got a perfect score on a test thanks to it, she along with many students were dragged by the Salesman to his workshop, but they were saved by Rinne and Ageha.
She naively bought a cheap second-hand coat at a flea market, which attracts a mannequin by the time somebody wears it, and left it to Rinne to resolve its problem, though he expects her to pay him for it.
- “Gyaaaaa, Scaryyyyy” (きゃーっ、こわいーっ！！) – Whenever she and Miho run away
- Her surname was revealed only in the anime.