Question: are meliodas and zeldris twins?
Answer: Zeldris「ゼルドリス」 is an elite warrior of the Demon Clan, serving directly under the Demon King as the leader and Piety of the Ten Commandments. He is also the younger brother of Meliodas, as well as the youngest son of the Demon King, whom Zeldris also serve as representative and executioner.