Lucy

Lucy is a Diclonius girl around eighteen. Lucy has developed strong emotions of hatred and vengeance towards human beings mainly because of how she was treated by the majority of them as a child; they made fun of her horns and gave her insulting nicknames such as "Freak." As a child, she bonded with a dog which was killed right in front of her by classmates, which triggered her first killing. Despite her hatred for most humans, she is in love with Kohta ever since meeting him when they were children, and will not kill him or anyone closely involved with him, most likely out of guilt for the incident that took place years ago.