Son was shown to be sadistic and cruel, as seen in the flashbacks of Mother's memories when he openly taunted and enjoyed the physical and verbal abuse she was being put through by Rui and Father, while addressing them formally as his parents, showing that he sadistically enjoyed playing the part of being in a "family". Similarly to Father, he was extremely loyal to Rui's cause and played his role as an elder brother in his family without question. Like most demons, he hated humans; he was resp