Mii Kusakabe is one of the three main sisters in the anime series Popotan. She is the youngest of the siblings and is known for her energetic and playful personality. Mii often acts childishly, loves to play, and has a strong attachment to her teddy bear, Unagi. Despite her innocence, she shows deep affection for her family and is often the source of comic relief in the series. Her enthusiasm and positive attitude help to bring warmth and lightheartedness to the story.