Lewis McCartney Picture - H2O
Lewis McCartney

Lewis and Cleo have been friends since they were five years old, and Lewis might be the only person the girls can really trust. He's smart, scientific, and an all-around good guy. He'll do anything to protect the girls and keep their secret -- which might have something to do with his crush on Cleo.

Typical quote: "If anybody found out, you'd end up a science experiment.