Gaara

Gaara - An experiement by the hidden village of the Sand, the Kazekage made him the Sand’s ultimate weapon. Gaara has known no love, no compassion ever since his own guardian tried to assassinate him when he was six years old.

Gaara ‘tattooed’ the kanji ‘love’ on his forehead and swore to love only himself and sought to feel his existence by killing others. He has never slept in years either as the Sand demon would take over his body and eat away part of his mind everytime he lose consciousness.