Firenze - a Centaur who taught Divination
Thomas, Dean - rooms with Harry
Trelawney, Sybill - eccentric divination professor
Troll - viscous, stupid creature, 12 feet tall, with small bald head
Diagon Alley enter through Leaky Cauldron
Splinching - the separation of random body parts when the mind is insufficiently determined during Apparition.