Her name is Muzan Kibutsuji and she is the Demon Queen. She is cold-hearted, ruthless, intimidating, and exceptionally intelligent. She sees no value in any humans she has encountered and shows little value in her own subordinates. She is very strong and powerful she can regenerate and her blood demon art is Biokinesis her blood demon art allows her to alter her body and shapeshift at will. Muzan thinks that she is a perfect Immortal being and she wants to live forever. She also is Expressive