klause is Campbell's older brother he died in the whom which made his body different but the shadowed essence concentrated in his mother's whom exercised and configured klauses peculiar body it is crystal lined with stone shadow essence. He raised his rib cage to put it around his jacket to hide his body is his past his skeleton key was broken when he was traumatized and experimented on for his strange body he lives under the city in the catacombs and there is only one way underground to them which is through the phantasma gardens were Campbell separated his soul when he was young and that is the only way underground throughout the entire city for a human klause collects skulls by going under the cemetery's and just taking them out of the ceiling he collects them from good people and the collected energy makes a good aura for the city were it battles the bad energy people tend to make he keeps things in balanced in a way.