Prior to the Tragedy, Komaru had a cheerful and optimistic personality, somewhat similar to her brother. She loved Makoto, telling her brother to do his best while enrolled at Hope's Peak Academy.

As of Danganronpa Another Episode, Komaru began as a somewhat hypersensitive and quite cowardly character. She wavers between hope and despair as a result of her forced imprisonment. She doesn't want to have strong hope, because she believes it will be lost eventually, leading to worse despair. She ha