Suu is a Slime girl. As a Slime, Suu's true form is a large mass of a transparent blue gelatinous slime. She also has a mass of green "hair" with three yellow "antenna" on the tips. For easier interaction with humans, Suu shapes herself into a somewhat humanoid form. At first glance, Suu seems to be a childish and simple-minded individual. She has a rather innocent, happy and sunny disposition and seems to be pretty friendly. Suu's main method of learning seems to be through mimicking.