Tasumi is Riley Daring's best friend, who is of Japanese descent who has a crush on Jacobo and kissed him revealed in one episode. There is hint of Tasumi's crush on Jacobo in "The Truth Hurts" when she passes on a note in the classroom that asks Jacobo if she liked him and was crushed when he signed maybe. She wears a pink metal suit which resembles RoboCop, but during season two she no longer wears her suit. She claims her family is part of a crime-fighting team (which is a parody of Power Ranger/Super Sentai). She also has a list of people she hates. Riley is either on or off it throughout the series. In the episode "Best Friends For-Never?", it is revealed that Riley first meets Tasumi in a broom closet when she was new at school and tried to get to homeroom but got lost. Tasumi was in the broom closet because she split her armor and was embarrassed, but Riley fixed it with the ducktape her dad made her carry. In the episode "Tasumi Unmasked", it is revealed that Tasumi is in fact a cute and very beautiful Japanese pop star. She moved to Pleasant Hills in order to escape the constant adoration of her fans and live a peaceful life, as Pleasant Hills was voted as the least culturally aware town in the world and she believed that nobody there would recognize her. However, in order to make sure that nobody recognized her, she wore a costume from a popular anime and used details from that anime in order to get a new history. That's the reason she always referred to things such as fighting giant monsters and so forth, but in reality, she never did anything of that sort. When her fans found out about this, she moved back to Japan for 2 weeks to record a new album until Riley replaced her band members with orangutans and she got kicked out by her new orangutan members because she had thumbs (which is an error of the writers, as orangutans actually do have thumbs). She came back to Pleasant Hills with Riley and no longer wears her armor, dumping it in the garbage.
For the first and half of season 2, Tasumi wore her pink battle armor, but in the second season, she now wears a light green collared shirt with a blue-green vest, a blue skirt with green lines, and black shoes. She also wears a green bracelet on her left arm.
Throughout "Late Night with Todd & Riley", she wears a blue and black tank top and pants, her pink battle boots and helmet remained on her face and feet.
Tasumi is a girl of Asian descent with pale colored skin and somewhat slanted eyes. She has long black hair and a small mole.