User blog comment:Derax-Pagani/Chapter 509: Kagura vs. Larcade Review/@comment-3285005-20161108025138/@comment-24102956-20161108204707

The Demon King (the evil dad of Meliodas, Zeldris and Estarossa) is the one who gave the TCs their decrees in the first place when appointing them as his elite warriors of the Clan.

Gowther used to be one of them, the Selfless before he lost his memories, identity and sense of self under unknown circumstances that contradicts what he's supposed to uphold. Fraudrin was his temporary replacement holding that Commandment until he dies and its curse will come back to the rightful owner.