Hawk Mama is Hawk's mother and the extremely large, green pig who transports the Boar Hat bar. She is introduced to live underground and transports the bar Boar Hat with her head. So far, her name remains unknown but she has gained many aliases.
Hawk Mama is a humongous pig who wears the Boar Hat bar like a hat. She is depicted to have lime green colored skin which is very unusual considering the skin color of her son. Like her son, her ears are shown to be M-shaped.
At the time she was known as Mother of Chaos and the Great Oshiro, Hawk Mama had a white color. It was said that her body radiated white light.
(Source: Nanatsu no Taizai Wiki)