Sukuna is selfish, cold-hearted, immoral, and exceptionally sadistic. He loves playing with his opponents, wanting to see their true potential right Infront of him to then kill them. This was Sukuna's way of having "fun", but in a twisted way. When he was reincarnated shortly after Yuji ingested his finger, he commented, implying the slaughter of women and children and likening them to maggots crawling around. Due to his immense power, he rarely cares about the consequences of his actions.