Millions Knives
Character from Trigun.
An Independent Plant born with his twin brother, Vash, on one of the Project SEEDS ships prior to the crash on No Man's Land. After learning of the inhumane experiments and treatment of an Independent born before he and his brother were, Knives grew to have an intense hatred for humanity and wants to wipe all the ones that have survived on No Man's Land out. He generally has a very narrow view of the world and tends to be cruel and sadistic, even towards those he allies himself with.
Has a very complicated and intense relationship with Vesper. She was one of the first humans he met and decided to keep around (outside of Dr. Conrad), so they've been side-by-side for the better part of a century. Their relationship tends to lean mostly toward sexual since Knives constantly fights with himself whenever he has to confront his romantic feelings for a human. Their relationship gets more complicated when Vesper refuses to help him commit genocide on the people of No Man's Land.