Soul Eater

Soul Eater primarily revolves around students classified as meisters at the Shinigami Weapon Meister Vocational School (Shinigami Buki Shokunin Senmon Gakko) or Shibusen for short, located in the fictional Death City, in Nevada, United States. The school is run by Shinigami, the God of Death himself, as a training facility for weapons and the human wielders of those weapons, the meisters. Each meister has at least one demon weapon companion which has both a weapon and human form. Shinigami created the school as an organization that enforces peace in order to prevent the rebirth of the "kishin", the evil demon god that nearly destroyed everything by plunging the world into chaos. Human souls that have become evil by straying from the path of humans have a high risk of becoming kishin, so evil humans are constantly being hunted down and killed by the students trained at Shibusen.