Isabella

Isabella, also known as mama by the children, is the main antagonist of the promised neverland and the mama who runs the grace field house orphanage, known as plant 3. She is a woman with black hair tied into a bun that hangs down onto the back of her head.

She wears a black dress with a white shirt underneath it and a white apron on top of it. She has shown that she has a heart and cares about the children when around them. However, when she is not around them her true personality is revealed. She is really a servant to the demons who feed off the children. Her past is unknown, except that she was one of the youngest ever chosen to become a mama. She has shown that she is very intelligent and can find the littlest of details. She quickly and easily found out about the children's plan to escape and has been able to keep all her children healthy and top of the line.

Trivia:
She is the youngest ever to become a mama.
She was also an orphan at an orphanage.
Her number on her neck is '73584'.
Isabella was the first character to speak in the manga.