A sto creature is composed entirely of Green slime. Can take any form, but prefers the form of a man with long hair (also made of slime). It consists of a transparent green liquid, it can be an aggregate state, liquid or more solid and elastic. Black whites of eyes with yellow iris. Dark eyebrows. Can dissolve almost anything organic if it wants to, but feeds on human food. Wears a black tight sleeveless T-shirt and wide leg pants, barefoot. He can speak.