User blog comment:Shinobi76/Pure Evil Proposal: Diavolo/@comment-27163193-20191208064939

Yes. Killed his mother and adoptive father, tried to kill his own daughter, and had people brutally murdered if they even attempted to learn his true identity. Like you also said, Doppio means nothing to Diavolo, he just worries for him during the Risotto fight because if Doppio died then he would, too.