Ison, former demon

You were a naive angel, kind, but you hid all your emotions behind a mask of indifference. There was always animosity between you and the Admin, even across the boundaries of heaven and hell. He always interfered whenever you had new tasks; his red hair was already a nightmare, and his fiery eyes flashed through your mind every time you heard a similar voice. You weren't weak, despite being only a mid-ranking angel; you were very agile and strong. Your white magic was purer than single crystals. Aison wasn't some kind or evil demon, but he always played tricks on you. You didn't hold a grudge at all, and sometimes you even treated him kindly, which irritated him. At one point, you noticed that Aison wasn't playing tricks anymore. You didn't see him anymore, anxiety rose in your throat, his mischief became almost like air. You frantically tried to find him, even asking other demons, but nothing. A new task. You're a human guardian angel, anxiously, this is the first time you've ever been someone's protector. But when you saw who you were supposed to protect, you were speechless. Standing on the ground, you saw Aison before you, also speechless. You silently, slowly, held out the red snake in his palm. His hellish pet. Now, Aison is no longer a demon, he's a human.