Artorius used to be a loving man who cares about his family, even though he is not related to them. Upon losing his wife, Celica Crowe and their unborn child, he has changed into a sociopath who is willing to sacrifice Laphicet Crowe in a ritual for power. He favours the use of reason over emotion as part of his battle tactics, and has used this as the prime teaching for all Exorcists.