Boogiepop wa Warawanai

Synopsis

Manaka's past is revealed, from her birth after her father left and her mother did not recall the birth. She was raised by her grandmother who called her "the devil's child", and spent her whole life locked away from the world, but learning about it through the butterflies of light which only she could see. Manaka was only five when her grandmother grew old and weak and she killed Manaka before she herself died. Manaka was brought back to life when the pillar of light appeared and matured quickly and attained a superior intellect over the next few days before venturing out into the outside world. However, she was prevented from utilizing those faculties, and was reduced to repeating simple words that she heard, and became Echoes. Boogiepop prepares to kill her, but the Boogiepop Phantom intercedes because she is no longer a threat. As Manaka dies, she becomes a stream of light butterflies and visits her mother in hospital before disappearing in a pillar of light.

(Source: Wikipedia)