Melania

Melania, or simply referred as the Sovereign of The Mermaids was the leader of the Mermaid race, however, upon succumbing to abyssal corruption and additionally adding a case of attempted slaughter to Youkai, she led herself to be killed by the reborn Electro Sovereign Raiden Ei.
== Appearance ==
In legends, Melania is a mermaid with dark blue hair with a cyan streak, her eyes are turquoise that can glow up and a blue eyeliner. She had an amulet symbolizing a sapphire, unlike her mermaid fellows, her arms are fully covered with blue scales, her fins glows into cyan within the dark.
In her corruption, her sclera turned into pitch black while her nails becomes razor sharp like a dragon's claw.
== Profile ==
Melania was a benevolent leader of all mermaids, the Seven Sovereigns depicted the Sovereign of the Mermaids to be a legend, additionally, belong with Nibelung, the two were one of the most historical figures in Teyvat's history. However, in the aftermath of the Heavenly Principles' infiltration, Melania and the mermaids were totally ferocious on them then decided to get into a conflict with the humans especially gods. 
The day when the cataclysm arrives, Melania suddenly got into the Abyss and was wounded by an unknown monster, resulting Melania's abyssal corruption. After exposed into the corruption, Melania lost all of her memories and has gone insane, other mermaids were also affected by the corruption, leaving several casualties per nation, for Melania herself, she devastated at least thousands of people in Mondstadt, and ten thousand in Inazuma, while her killing spree continues, Raiden Ei witnessed many people were killed by a corrupted Melania, the Sovereign of Mermaids attempted to slash Ei with her claws, but lost her life after the Electro Sovereign deals with the final blow.
Many mermaids mourned in their leader's demise, after Melania's passing, a sculpture was created by the civilization, to honor on how she led them peacefully.