Mermaid Milly or Ariel is the youngest of King Triton's seven daughters who lives in a castle under the sea.

Mermaid Milly or Ariel : kids party character

Mermaid Milly

Mermaid Milly or Arial, if you'd prefer, is the youngest of King Triton's seven daughters (being 16 years old).  She is certainly adventurous and curious about the world of humans, a fascination which angers her father as merfolk are forbidden from making contact with the human world.