In Justice League (2017) movie, when Steppenwolf arrived in Atlantis to take one of Mother Boxes, a woman fought with him. She was capable of controlling water waves and she even trapped Steppenwolf in a bubble of water waves.
Who was she? And, what are her superpowers? Anything even from the comics?
She appears to be a Queen of the sea, similar to Aquaman. Wikipedia lists her powers as:
Mera has the unique ability to form "hard water" objects, as well as super strength and powers related to her adaptation to live under water. She has been shown to be powerful enough to control, albeit briefly, huge amounts of water, enough to pull an entire army out to sea. Due to her intended role as an infiltrator and a killer, Mera received extensive training in Xebel, becoming a formidable opponent on her own.
