Yuko Tanaka is a scientist who studies Slime Cats. Slime Cats are a kind of parasite that lives in people’s stomachs, and ever since she was diagnosed with them, she’s written about it all. Her work is available to all, and many people come to her asking for help. She has equipment like a doctor. (Slime Cats are a kind of parasite that lives in people’s stomachs harmlessly, and cannot be treated. They speak telepathically with their host and are capable of human speech.)