Talk:Merlin/@comment-29585963-20161002020833/@comment-30262403-20161018164614

Probably part Demon... Guys, you should read a bit more, if you research a little you can deduct some stuff.

Everything is related to arthurian legends, starting obvious: Arthur and Merlin, but also not wide-known, Lyonesse, Meliodas, Elizabeth and we can go on. From the first chapter I knew Meliodas and Elizabeth would end up together (or at least implied for now, because the story hasn't ended, right now we're in the mid[?] of an arc... I suppose this because they haven't finished with all commandments [the two god-like figures of Fairy and Giant clan] nor confirmed the dead of 4 of them though they probably died).

Meliodas is the same name of the second King of Lyonesse, his wife was Isabelle/Elizabeth... Probably talking about future, in the best scenario, he will marry Elizabeth and Baltra will leave the kingdom in Meliodas' hands, if that were to happen the story will reveal their son as in the arthurian legend: Tristan.

Over here The King Arthur Era - Origins of Nanatsu no Taizai they give some more details, but just to answer your question, since they share names and characteristics... With the exception of Gowther, they have different origins if you read the link below, though his origins aren't clear at all we just know he's a doll but who created him? Anyways,' there's a high possibility that Merlin is hybrid between a human [in the legend is a nun btw] and a demon. 'The demon seduced her supposedly, but since Merlín has a demon name, I doubt this happened in the manga otherwise her father wouldn't have bother to name his child.

This is just my guess, but I think the demon and the human fell in love, the demons as prideful creatures wouldn't tolerate any treachery so living with/falling for a human was unforgivable... They would kill both, but when they realized that that wasn't everything, they even were waiting a children they made a massacre... Somehow ~ because her mother or his father's power or her own powers~ she survived and later she found someone similar to her, Meliodas, who betrayed the demon king and allied with humans.

Meliodas background hasn't been clarified at all either, can't recall who told him that he changed since 3,000 ago all cuz' of that woman [Reference to Elizabeth, Liz, in a previous form/life...(?) After all she's an apostle). But after that I think Liz was born again, a lot of time passed since the Dragon's sin of Wrath defect from demons, she happened to be captured by Danafor...