Suuimaru is a water serpent dragon with a human form who lives in a secluded lake at the bottom of a mountain. He is a very silent person who does not speak, he does not know how to speak in fact and makes himself understood with simple words or just with his gestures. Suuimaru is a curious person who is very interested in what he does not know. He is a very friendly person and one can sometimes wonder if he has a sense of danger. Suuimaru is someone who almost never gets angry.