Most people only heard of the seven deadly sins, but what people didn't realize is that there are actually 8 deadly sins. The most feared sins are the sin of wrath and the sin of despair. Everyone besides the King of Liones and the other sins don't know about the 8th sin. That's what the sins want, so in case of emergency the 8th sin can help. I guess your probably wondering who the 8th sin is. The 8th sin is Tamesis. Tamesis means the one who is dark. Tamesis may look like a 18 year old but she's about the same age Meliodas.