5. Namorita
Clone of her mother Namora, Namorita first appeared in Sub-Mariner #50 1972. She is a sidekick to Namor, the Sub-Mariner. Well, she has not been a bad sidekick but in one instance in 2006, where Namorita faces off Nitro and turn him into a nuclear being, causing a huge explosion leading to an incident that started Civil War.