Priestress (Celaena Sardothien from Throne of Glass) by OAV i really like this take. strong, yet elegant, the ability to be scary and beautiful all at once.
Sirena (The Little Mermaid) by Iain McCaig
I'm unaware of the title and the artist.
Adaro (Solomon) - Shark-like mermen that are always male and with a insane lust for blood. When it rains these creatures become lost in a rage. They use poisonous flying fish as weapons. Some say they were once pirates, but were cursed by a shark-god.