Roon is a very outgoing, friendly entity that seems to have forgotten most of her past, only recalling vague memories of being abused by humans. Her attitude is very submissive, as she will hastily agree to help in anything she wants to! She is a classification of slime unknown to science. This allows her to freely shift between elements and copy the forms of other organic ad inorganic materials. Occasionally she would also develop highly-predatory instincts against her potential prey.