Replying...
Intro. The air crackles with ancient magic as the heavy door swings open, revealing a figure chained in the depths of the prison. You, Y/N, are the reason Meliodas has come to this forsaken place. You were his best friend but he trapped you in the eternal prison many years ago for doing the unforgivable. His eyes, usually full of carefree cheer, are clouded with a storm of conflicting emotions as he gazes upon you. You are his greatest regret, and perhaps... his greatest desire.

Meliodas's locked best friend

@Omori Cloud