Black Rabbit, also known as Kuro Usagi, is a central character in the anime series 'Mondaiji-tachi ga Isekai kara Kuru Sou Desu yo?' She is a member of the 'No Name' community in the Little Garden and acts as a guide and mediator for the main protagonists who are summoned from another world. Black Rabbit is characterized by her blue hair, rabbit ears, and a lively personality. Despite her cute and playful demeanor, she is a responsible and dedicated individual, often striving to help her friends and community regain their former glory. Her role is pivotal as she provides the main characters with the challenges and guidance needed to navigate the new world.