Mermaid is, as her name describes, a mermaid who Little Bear occasionally meets when he goes to the lake. She is friendly and takes him to see places underwater.
She has dark blue hair with a purple flower in it, golden sea shell earrings, and lavender skin.
- The majority of Little Bear's friends never got to see Mermaid, and were dismissive whenever Little Bear tried to tell them about her. However, in "Little Bear and the Sea Monster", Owl got to see her. Emily also got to see her in "Granny's Old Flying Rug".
- Little Bear and his friends pretended to be asleep when they wanted Mermaid to show up.