Kiui Watase is a main character in the anime series 'Yoru no Kurage wa Oyogenai.' She is a cheerful and energetic high school girl who brings a sense of optimism to the group. Kiui is known for her distinctive style and playful personality, which often helps to lift the spirits of her friends during difficult times. In the story, she plays a central role as a supportive friend and teammate, contributing to the emotional depth and camaraderie within the core group of characters.