Tarin Mito is a human, living on Earth. She is the younger sister of Karen Mito, with whom she lives. Tarin is currently employed at a fast-food restaurant, a job she hates, where she works alongside Cody Ishrian. She has trouble making friends, mainly because she believes that "people are idiots", and has (reluctantly) seen a therapist at some point to try to deal with these unfriendly tendencies.
It is currently unknown whether Tarin and her sister have any connection to the Mito siblings on Ui.