As the title suggests, the seven deadly sins are attributed to the main cast and they represent it in both their character and abilities. Meliodas, the first sin that Elizabeth encounters, is known as the Dragon Sin of Wrath. Despite having this name, he is rarely angry, but more so playful, perverted, confident and loyal to his friends. Ban is the Fox's Sin of Sloth, while he is violent and laid back and seems to care only about Meliodas and the other sins more than himself; he cares deeply about those close to him and is afraid of losing them. Diane more closely represents her Serpent Sin of Envy, having a short fuse, yet confident but jealous of any woman that Meliodas shows affection toward, and she expresses that with how close Meliodas and Elizabeth are. King is the Grizzly's Sin of Sloth. King also is known as Harlequin, the fairy king, and he was once the guardian of the fairy forest and the fountain of eternal youth. He is actually not quite lazy at all; he can be very fierce if the situation requires it. I've yet to find out whom the rest of the sins are as these four are the ones that have shown up for as far as I've watched.