Watashi is the main protagonist of the anime series 'Jinrui wa Suitai Shimashita' (Humanity Has Declined). Serving as a mediator between humans and fairies in a post-apocalyptic world where humanity is dwindling, Watashi is known for her sharp wit, dry humor, and pragmatic outlook. Despite her youthful appearance, she is intelligent and often cynical, navigating bizarre and whimsical situations with a calm demeanor. Her role is central to the narrative, providing both insight and commentary on the world's decline.