Mera

Mera is a fictional comic book superhero featured in comic titles published by DC Comics. She is a supporting character in the Aquaman family of titles and was introduced in Aquaman #11 in October, 1963. Mera made her television debut in 1967 in the "Menace of Black Manta" episode of the Superman-Aquaman Hour of Adventure, where she was voiced by actress Diana Maddox. A live-action version of Mera appeared in 2010 on the "Patriot" episode of Smallville in season ten. She was played by actress Elena Satine.

Comic background
Mera is an aquatic alien from an alternate dimension known as Dimension Aqua. As a native of that world, Mera has the ability to condense molecules of water to create "hard water" constructs, which can be used for offensive purposes. After becoming a refugee from her native world, she escaped to the Earth reality, where she sought refuge in the undersea kingdom of Atlantis. She married the heir to the throne, Aquaman and became the Queen of Atlantis. Mera and Aquaman bore a child some months later, but the baby was tragically murdered by Aquaman's nemesis, Black Manta. Mera never truly recovered from the emotional trauma she felt at the loss of her son.

Superman-Aquaman Hour of Adventure

 * Superman-Aquaman Hour of Adventure: Menace of the Black Manta

Smallville

 * Smallville: Patriot