Portraits are enchanted to move by the artist, but the degree to which they can interact with others depends on the power of the subject. Rowling has commented that a portrait is merely a faint imprint of the deceased subject, imitating their basic personality and thought patterns. They are therefore "not as fully realised as ghosts". In "Harry Potter and the Cursed Child" the portrait of Albus Dumbledore describes himself as only "paint and memory" and Professor McGonagall (his successor as headteacher of Hogwarts) comments that, although she speaks to Dumbledore to help her in making decisions, she is careful to remember that "portraits don't represent even half of their subjects".