Eve is a main protagonist from To-Love Ru. She was a well known assassin named Golden Darkness from another galaxy prior to arriving on Earth in an attempt to take the life of a human boy named Rito however it failed, leading to her eventually staying there and living an isolated life while trying to blend in. She was artificially created by an organization called "Eden" as they sought to create organic weapons as part of a Great Galactic War in the Talha galaxy. Her creator, Tearju, tried to raise her as a normal daughter but she was casted out. The later war resulted in Eden's disbandment and left Eve and a few other weapons alive and the planet in shambles. Since then, she roamed the galaxy as an assassin leading to her current status on Earth.

Eve has long blonde hair, dark red eyes, and a child-like figure. Although it should be noted that she can change her appearance to look older with her transformation ability. She is well known for her all-black Gothic-style signature leather outfit. Her outfit has a star shaped gap at the chest of her clothing, which can also be found on the clothing of Mea and Nemesis. It also features two waist belts, five-leg belts on both of her legs, and two sleeves that attach to her upper arm via belt. Another notable aspect of her appearance are her black hair clips on each side of her head which give her a cat-like appearance. When the Darkness Transformation was activated, her appearance (mostly her attire) drastically changed. She donned a much more revealing leather outfit with red sharp claws on each of her fingers. Two black horns appeared on her head.

Among her abilities she can form many types of weaponry or tools with her body or hair such as creating bladed or blunt weapons and even energy-based guns. When in Darkness form she's shown to be capable of things like short ranged portals using her hair forming a circular ring for her to reach through and even creating a large energized arm blade with the potential of splitting a planet in two.