Molly is a musical female guppy, and a natural born leader. She is kind, helpful, and a really good friend, like Oona. Molly co-hosts the show along with Gil and is classified the main protagonist. Due to her bubbly personality, every guppy wants to swim with her. She always makes it a point to turn to the camera, and talk to the audience directly, ensuring that they stay at the center of all the action. Molly sings nearly all the pop songs with her blue fish microphone (changed to yellow in Season 3), while the other guppies sing backup. She's good friends with all the guppies, Bubble Puppy, and Mr. Grouper.