When Aizo was still attending Nul university his psychopathic tendencies were at their maximum he would play games would people's lives but nine was worse to what he did to the Ikara twins.
The Ikara twins were prodigies like Aizo same age as him they were one boy and one girl.
Aizo realised the two were close so he thought it would be fun to see how one would react if the other was hurt by them.
He told the boy twin that the principal called him after class. He then made a robot which looked just like the boy act as him and play this routine were he would get in a fight with the boys sister and fall down the stairs and become unconscious.
The Ikara's twin (sister) was distraught seeing her brother become unconscious see tried to wake him up but he didn't wake she believed him dead what had she done she had murdered her brother that was what Aizo thought wads going on in her head he was probably right but who knows.
She then held on to the robots body weeping crying,begging her brother to get up, begging her brother to forgive her. Her cries were raw painful true to the heart this brought a smile to Aizo's face.
Later the girl found out her brother was alive but she saw this as her going mad and wanting to kill him. See asked her parents to send her to a mental institution were she would live the rest of her days the brother was so disheartened by this he went to a life on the streets all alone taking endless amounts of drugs and alcohol to calm his pain but it never did.
Aizo had ruined two peoples lives forever and broke apart a family but he found joy from it he really was a Demon a psychopath a narcissist.