Mrs. Pawson is the elderly mother of Cambridge don Dr. Pawson, who is the wizard who succeeds in uncovering the secret behind why Christopher Chant's powers appear to be blocked.  When Christopher is told to empty his pockets of everything silver and then told once more to try the levitating spell he had failed at several times, he causes everything in Dr. Pawson's house to levitate, including Mrs. Pawson. She apparates into the living room where Dr. Pawson is instructing a chastened Christopher in what he'll have to do to put things right, and tells him that it was very naughty of him and he could have done great harm.  However, later she makes a present to him of the extremely long multicolored scarf she has been knitting, and sends him off with the scarf and its many protective spells.