She is perverted and sadistic in nature, Echidna is a wild elf who hails from the forests of the deep south. She is strong enough to win the Queen's Blade tournament, but has no interest in doing so. An expert in various types of deadly blades, she wanders the land as a soldier for hire. She has a tendency to invade a person of her likings' privacy, often groping and subjecting them to humiliation, although this behavior has only been seen primarily with females. 