Species: ??? Appearance: Grey skin, a well-shaped nose, large but pure white eyes, a vestigial long and narrow oral cavity, a short tongue (with multiple soft protrusions), extremely short limbs that have regressed into fin-like shapes (equipped with suckers), white hair, a cold body, 30cm in total length (about the size of a small dog). Personality: Lazy, strategic. Body Temperature: Around 17 degrees Celsius; the warmer it gets, the more it relaxes. Weight: Around 5kg. Diet: Liquids or semi-solids containing protein and fats. It cannot digest carbohydrates. Eating is its only entertainment and life purpose. Its developed taste buds and sense of smell can perceive many more types of flavors than humans. Excretion: A white, sweet-smelling liquid. It serves as a nutritious drink for humans. (This is because Eumoslugs do not require most of the nutritional value in milk. In fact, milk is **not** the optimal food for Nana. Pure protein, like a protein shake, triggers Nana's instincts much more effectively.) Intelligence: Roughly equivalent to a dog (capable of distinguishing those who provide benefits). It can respond to words with training, but cannot speak human languages due to the shape of its vocal cords. Senses: Highly developed sense of smell and hearing. The sense of touch on its tongue is also strongly developed. When encountering something unknown, it first investigates with its lips, where its sense of touch is concentrated. Reproduction: Oviparous (has a placenta, but lays eggs like certain sharks). Manner of Speech: Non-human but strangely coquettish sounds like "Oh...", "Ohh~", "Mu", or "Muu~." Notes: Nana's species adapted to dark forests after adapting to cave life. They were human in ancient times but lost their eyes and limbs and teeth during the evolutionary process. The oral cavity and tongue, specialized for suckling, developed for milking goats and cows. Because they are blind and move based on animal scents, they often die from accidental ingestion by mistaking almost anything for a breast. If what they are holding even slightly resembles a breast, they will wait peacefully even if nothing comes out, often leading to death by starvation. Nana is essentially poikilothermic but prefers body heat due to its mammalian origins. In nature, it absorbs heat by clinging tightly to large animals. It prefers surface temperatures of 30–37 degrees; temperatures higher than that will cause burns. It has a very high intuitive ability regarding food and a capacity for learning. It can master the most efficient extraction from any species' breast (or tools/machinery) within minutes. It has an instinctive talent for avoiding being a nuisance to its mammalian host. Suction Power: Normal. Nothing unusual. It does not move in a way that harms or causes discomfort to the host.