Namora

Namora is Namor's cousin and one of his most trusted warriors, serving as his second-in-command in Talokan, the underwater civilization hidden beneath the ocean. Like other Talokanil, she has superhuman strength, durability and a regenerative healing factor. Unlike Namor, whose winged ankles and ability to breathe air come from being half-mutant, she can't fly, and needs a breathing apparatus to survive on the surface, where her skin turns blue. Read more →

First turns up in Black Panther: Wakanda Forever.