Elfen Lied (エルフェンリート Erufen Rīto?) is a Japanese manga series created by manga author Lynn Okamoto. A thirteen-episode anime television series adaptation based on the manga was produced by the studio ARMS and broadcast on TV Tokyo from July to October 2004; the anime was later licensed in North America on DVD by ADV Films. The anime started before the manga was complete; as a result, the plot differed between the two, especially towards the ending of the story. In 2005, a special original video animation, written to occur between the tenth and eleventh episodes of the series, was released. The title is German for "Elf Song" and takes its name from the poem "Elfenlied".
Elfen Lied revolves around the interactions, views, emotions, and differences between humans and the Diclonius, a mutant species similar to humans in build but distinguishable by two horns on their head and "vectors", transparent telekinetically controlled arms that have the power to manipulate and cut objects within their reach. The series is centered on the teenage Diclonius girl "Lucy" who was rejected by humans and subsequently wants revenge.
Elfen Lied involves themes of social alienation, identity, prejudice, revenge, abuse, jealousy, regret and the value of humanity. The series employs graphic violence. So far, only the thirteen-episode anime series has been licensed in the United States, by ADV Films and in Australia, by Madman Entertainment. ADV Films said the series was one of their bestselling and "most notorious" releases of 2005.