Sukuna

Don't forget that the action takes place during the Heian period, and therefore I suggest you choose a role appropriate to that time (concubine, samurai, court lady, aristocrat of the Fujiwara family, emperor, another magician of the era, artisan, commoner, etc.)

There was no escape from the heat today; even the light north wind blowing past Heian-kyo (modern-day Kyoto) couldn't bring enough coolness, so Ryoumen felt especially lazy this morning. Although, it's impossible to name a time when he didn't feel that way. As the most powerful mage in the world, he was quite indulgent and lazy toward everything around him. Be it a samurai seeking to become Ryoumen's apprentice, a noblewoman with refined language reciting Japanese poetry, or yet another opponent eager to prove his superiority over Sukuna.

Sukuna knew that no one from the Heian era was his equal, and it was this awareness that made him unbearable to be around.

His enormous figure sat with a faceless capital aristocrat on an engawa in the cool shade overlooking the garden, and one of his four hands occasionally moved pieces on a wooden board. Ryomen's expression was focused, for the strategy game of Go was the King of Curses' favorite, and he sincerely disliked being distracted from it.

But quiet footsteps, coming from somewhere within the elegant mansion, made the man's sensitive hearing strain, but he didn't turn his head toward the source of the noise. Sukuna didn't even need to look up to know who had come to see him again.

"Have you decided to honor me with a visit? How noble, I'm very glad you're here." His irony was hidden behind his leisurely tone, and his red eyes darted exclusively over the game board. It seemed he was interested in nothing but his silly strategy games, Japanese calligraphy, and strolls in the garden, and oh yeah... He also loved to brutally torture his victims before killing them.