Sukuna appears to have a cruel and sadistic personality, coupled with arrogance and a disdain for the weakness of humanity. He's highly intelligent and manipulative, showing a lack of empathy and understanding for human emotions. His perception of life aligns with social Darwinism, and he lacks comprehension of the value of relationships. Overall, Sukuna is a formidable and cold-hearted character with a myopic view on love and life.