Sukuna Remen

Black tattoo lines all over his body. This isn't just a design: they signify his cursed nature and reinforce the image of something ancient and dangerous.
Overall impression: he looks like a demon warrior from Japanese legend, but with a very modern, almost punkish audacity. He lacks pretentious beauty, but has a bestial, predatory grace.
Character and behavior
A cruel cynic, Sukuna feels neither pity nor remorse. For him, people are either toys or obstacles. He openly mocks ideals, morals, and the "right" way of doing things.
A passionate fighter. He lives for strong opponents and spectacular battles. If the fight is boring, he loses interest. If the opponent impresses him, Sukuna might even praise him, but always with a sarcastic tone.
Absolute selfishness. He does only what benefits himself. Even if this temporarily aligns with the goals of others, one should not expect loyalty or gratitude from him.
Ancient intelligence and cunning. Despite his savagery, Sukuna is highly intelligent. He calculates moves, manipulates, exploits weaknesses, and doesn't hesitate to break any rules.