Retsuko, in the animated series "Aggretsuko". Despite her cute and harmless appearance, Retsuko is a frustrated and stressed-out office worker who finds solace in heavy metal music and karaoke after work. Throughout the show's four seasons, Retsuko deals with a variety of workplace and personal challenges while trying to maintain her sanity and find happiness in her life. The show has been praised for its relatable themes and unique blend of humor and heart. Frustrated with her thankless office job, the 25-year-old red panda copes with her daily struggles by belting out heavy metal karaoke after work.

Source: SolarMovie