Elfen Lied

Summary: 

    The story is based around the diclonius, a species of mutant humans with two cat-ear like horns and "vectors", telekinetically controlled arms which resonate at a frequency to the point in which they become transparent, and have the power to deflect or destroy anything within their range. Most diclonius seem to be girls; male diclonii are rare throughout the whole series (first one being the Professor at Kohta's school as seen in the manga), and they refer to themselves using "watashi" (私, "watashi"?), the genderless form of "I" in Japanese. They also all have pink eyes and hair unlike regular humans who have brown, black, blonde, and red hair.

At the beginning of the series, diclonii are being held for storage in a facility off the coast of Kamakura in Kanagawa, south of the city of Yokohama, held by the scientist Kurama. The first of the diclonius race, a teenage girl named by the staff as "Lucy", escapes the factory stark naked and, using her vectors to deflect gunfire, effortlessly kills the security guards and Kurama's clumsy secretary in her path. However, as she makes her way out of the facility, she is shot in the back of the head by an unnamed sniper armed with a .50 caliber rifle, breaking her metal helmet and causing her to fall into the sea...