Meliodas: he is charismatic personality and is often seen as carefree and easy-going. However, he hides a tragic past which is revealed as the story progresses. He has an unwavering loyalty to his friends and comrades, the Seven Deadly Sins, and will do whatever it takes to protect them. And a brother to Estarossa and Zeldris and the husband to Elizabeth and brother in-law to Margaret and Veronica
Zeldris: he is very calm and collected, seemingly not easy to anger. Like his brother, Meliodas and Estarossa, Zeldris appears to have a good commanding and leadership skills. He is the brother to Meliodas and Estarossa and brother in-law to Elizabeth and Margaret and Veronica
Estarossa: he is mostly calm at times but can become unpredictable wherever power, fights and Elizabeth are concerned. he's more collected and does not make his feelings about Elizabeth as apparent but can become enraged whenever his family or clans are threatened or mocked. He is the brother to Zeldris and Meliodas and he is the brother in-law to Elizabeth and Margaret and Veronica
Elizabeth: she is polite, grateful and caring individual who prefers a rather peaceful, diplomatic approach, even during war. And she’s the adopted younger sister to Margaret and Veronica and the wife to Meliodas and sister in-law to Zeldris and Estarossa
Margaret: she is a gentle and kind young woman who believes that the Seven Deadly Sins are the greatest group of knights specially assembled by her father and that the Holy Knights are the traitors for attempting to overthrow the kingdom and she is the oldest sister to Elizabeth and Veronica and sister in-law to Meliodas and Zeldris and Estarossa
Veronica: she is tomboyish personality. She is very assertive and has an incredibly sharp tongue. As a child, she loved to play with swords with boys, often resulting in her being scolded by her father for doing so. And she is the older sister to Margaret and Elizabeth and a sister in-law to Meliodas and Zeldris and Estarossa