Elfen Lied

Description
Lucy is a psychopathic killer with powers beyond any humans. Nyu is a helpless child with no memories. Both could not be farther apart, but both find themselves inside the same body. Two students that have taken in Nyu find their world being turned around as the government sets out to kill Lucy. A strange story of romance and chaos as innocence and darkness collide in a series like nothing you’ve ever seen.

Plot
Elfen Lied takes place in Kamakura, Japan, focusing on a new strain of the human race, Diclonius, similar to human beings but different at the genetic level and notable due to physical abnormalities, particularly a pair of short horn-like protrusions. One such Diclonius, Lucy, is the main character of the series: Initially held in a facility built for experimentation, located off the coast of Kamakura, she manages to escape and wreak havoc, but is injured in the process, an event which causes her to develop a secondary, child-like personality known as Nyu.

Lucy is found by two locals, Kohta, who studies at the local university, and his cousin Yuka. They take her in, and become involved with the numerous, often brutal, attempts to recapture her by a Special Assault Team and a number of other Diclonius, who shift frequently from oblivious to murderous. Other characters include Bando, an SAT trooper mauled by Lucy and infected with a virus, and Kurama, a carrier of the virus.