Here is a description of Pai, via the game’s official website:
Pai is as soft and gentle in her personality as she is physically. She is certainly not fat! She is of average weight, slender, graceful, and has skin not unlike a marshmallow.
Overflowing with tolerance for others and filled with compassion, she is like a loving saint, amiable as the ocean. She is a kind mother to the class and easy to love.
Watch the video below.