Th Heavenfiend Lonestar is a unique Tool Spirit.
Legend has it that there was a star that was especially bright on the day he was born. His martial soul was automatically awakened after his birth. On the same night, his mother died from losing too much blood, and his father passed away when he was eight years old. After this, his friends also died one by one. It was later discovered that his Spirit was the Heavenfiend Lonestar that targeted his family and friends. Because of this, he is destined to be alone for the rest of his life.