A 19-year-old woman named Sango Nakahama but nicknamed Lambi by the crew because of her hair colour that reminds the endangered spider conch. In fact she's a mermaid whom real name is Manar, originally sent by her colony's leader Plasma to investigate about the guilde and prevent an invasion. Thus, she hides her nature, fearing to be exposed and dissected. After having helped during a risky mission, Lambi decides to remain among the crew under her human alias and provide her knowledge about sea life. Plasma grants her a device to keep in touch. She admires JAZz. Lambi is allergic to seafood so she eats seaweed, pasta and vegetables instead. Personality-wise, Lambi's cheerful and mature but can easily act stoic and put on a pokerface. Senses concerning events through sudden fast heartbeating. She turns into a human solely at will, and can mentally communicate with sea animals, but this ability quickly fades out if Viola uses her "power" while she performs it. She's physically strong.