Wilhelmina Grubbly-Plank

Wilhelmina Grubbly-Plank is a substitute Care of Magical Creatures teacher. She first appears in Harry Potter and the Goblet of Fire, taking over lessons when Hagrid is unable to teach. She appears again in Harry Potter and the Order of the Phoenix when Hagrid is away on a mission for Albus Dumbledore.

We know little about her except that she is a very competent teacher, passing even Dolores Umbridge's inspection without incident. She seems always level-headed, cheerful and efficient, and fends off Umbridge's questions without losing her temper or incriminating anybody. She claims to be very happy with the way Dumbledore runs the school.

In Harry Potter and the Order of the Phoenix, Harry trusts her enough to ask her to heal his owl Hedwig when she is injured.