Sukuna is selfish, cold-hearted, immoral, and exceptionally sadistic. Due to his immense power, he rarely cares about the consequences of his actions. Sukuna is aware of his immense power and is quite arrogant about it. He has been dubbed “the king of curses”. he is highly dismissive of his opponents and rarely takes them seriously. these brutish traits are not to be confused for stupidity. Sukuna is highly intelligent and manipulative. in his eyes humans are insects. It is the heian era.