Elves' Song or Elfen Lied
is a 13-episode anime adaptation of a manga by Lynn Okamoto that revolves around the interactions, views, emotions, and differences between human beings and the Diclonii, a mutant
species similar to humans in build but distinguishable by two horns on their heads and "vectors", transparent telekinetically
controlled arms that have the power to manipulate and cut objects within their reach. The series was ranked No. 1 on Watchmojo.com's Top 10 Mature Anime Series
is centered on the teenage Diclonius girl "Lucy" who was rejected by human beings and subsequently wants revenge. Opera singer Kumiko Noma performed this haunted song called Lilium.
Watchmojo.com YouTube Channel Reference:
The Top 10 Mature Anime Series: youtu.be/lhu6LmvpZsc