Everyone has valid points. I truly believe it was Meliodas who killed the grey demon and seeing the wound makes it more possible in my mind. However I'm curious, if there's a red and gray demon is there other stronger colored ranks? And if so, what would Meliodas classify as? Seeing as it's been...
Something, Something cookies :U
Anyway heya! Nice to meet you all, I'm Arcanum! I'm here for the Nanatsu no Taizai discussions since it's been my favorite manga since last year! Happy to be here and all that rot.
With Dark Regards, Arcanum.