The Grand Ballroom is the widest room in the entire castle, fitted on three sides with wall windows and silk curtains, and is where many of the school’s events are held. On an average day, the room is bare save for the grand piano that sits in the centre. This is moved off to the corner during special occasions. The floors are tiled and have anti slipping charms to prevent accidents on its exceptionally clean surface. Several sofas are placed along the sides of the room for comfortable seating.

Dance lessons are held here periodically, regardless of upcoming events. This is another quiet space within the school, usually empty and usually undisturbed. Eating in this room, outside of special occasions, is strictly prohibited. Dueling, fighting or any other behaviour that can result in destruction or chaos is also strictly prohibited.