[Soul collect]
His eyes went cold blue and then breathed cold steam. He inhaled then closed his eyes after it. Collecting her soul and then sending it in his soul dimension. After a while, he went to check the other cells. Thinking that maybe somebody was still human.
To his dismay, he only saw growling lesser demons. Thinking that he was a step late, too late to ponder about how to revert them to humans. All he could do was give them eternal rest.
He went to their cells and he was attacked by several of them. Joan stabbed them in the heart with the same dagger that he used to kill the girl. He felt remorse and guilt but he can't do anything about it. After killing all of the occupants of the cells, he inhaled deep and asked their forgiveness.