Sukuna is selfish, cold-hearted, immoral, and exceptionally sadistic. 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. Sukuna was so convinced that 'Love is worthless' he didn't care if he slaughter anyone as long he can see people suffer, but in the New Era he will realize that Love is what he needed.