Name: King Neptune
First Appearance: Comic Cavalcade #9 (1944)
Creators: William Marston and H.G Peter
Abilities: Olympic level swimmer. Possession of rebreather masks which allow one to recycle the ocean into breathable air. Electric tridents which emit paralyzing ‘electric flames’. Possession of ‘Nepenthe’ a draught which erases ones memories to make them forget their past. Massive submarine base which is disguised as an island. Army of trained swimmer which rival her in ability. Heavy explosives which can be fastened to a ships hull.
Backstory: An olympic athlete who turned to a life of crime, Leona Masters was a multiple gold medalist who had gained great recognition as ‘the Mermaid Queen’ for her incredible ability to perform.
However after being barred from the Olympics for ‘breaking training rules’ and having her successes stripped from her, Leona Masters swore revenge!
Thus using the fortune she had amassed by riding her fame, Leona commissioned a submarine disguised to look like an island, she would proceed to enlist a number of women who were sympathetic to her cause and train them to swim and dive like she could.
Soon outfitting the lot of them with explosives, electric tridents, nets, and rebreathers, the lot of them would assume disguises in order to commit their crimes with none the wiser.
Leona would done a costume to make herself look like the Roman god of the sea, King Neptune. With her minions donning swimming skirts which could be zipped up to give the appearance of mermaid tails.
Thus they would fasten explosives to the bottom of ships, detonate them remotely, to send them to the ocean floor, and capture any survivors, forcing them to drink ‘Nepenthe’ a draught of forgetfullness so they would be more willing to join her cause.
Then it was simply a matter of plundering the ship wreckage and then they would be off on their way to their next target as pirates of the sea disguised as lords of the deep.