Mabel Laybelle is a supporting character in the anime series 'Isekai Ojisan' (Uncle from Another World). She is a former knight hailing from the royal family of the Laybelle region, renowned for her mastery of the Frost Sword. Mabel is depicted as reserved, somewhat gloomy, and socially awkward, struggling with her sense of purpose after losing her position. Her interactions with the protagonist, Ojisan, help her rediscover her motivation and provide comic relief, making her a memorable and endearing character in the series.