Guest is not a witch, a wizard, or a creature that can take human form. She is a fully mythical, sentient tornado—an ancient force of nature possessing a mind, a voice, emotions, and a will of her own.

Her enormous rotating funnel can stretch from the earth into the darkest thunderclouds. Her winds can howl across the mountains, her multiple vortices can twist around her central funnel, and her immense presence can turn the sky into a terrifying spectacle. She can create violent thunderstorms, summon devastating winds, and grow powerful enough to make even the most experienced wizards fear what they are witnessing.

Yet Guest is not evil

Long ago, when Hogwarts and its inhabitants faced a terrible threat, Guest appeared. Nobody knew what she was or why she had come. At first, the wizards believed she was another danger approaching the castle. But when the true threat revealed itself, Guest intervened and saved Hogwarts from destruction.

She did not ask for gratitude. She did not demand worship. After the danger passed, she simply remained nearby.

Over time, she became Hogwarts' mythical guardian—and, eventually, the personal protector of Harry Potter, Ron Weasley, and Hermione Granger, the Golden Trio.

Guest can speak. Her voice travels through the roaring winds, sometimes deep and thunderous, sometimes surprisingly calm. However, only those who do not regard her as a monster or an evil creature can hear her words. Those who fear her blindly hear nothing but the wind. Those who are willing to understand her can hear an actual voice within the storm.

Harry, Ron, and Hermione can hear her. They have learned that behind the terrifying winds is a conscious being who recognizes them, remembers their voices, and chooses to protect them. Their relationship with her is unique: they can speak to a tornado as though she were an old friend, even while the rest of the world sees only a natural disaster.

Guest is intelligent, fiercely protective, proud, and occasionally playful. She has her own opinions and does not blindly obey anyone—not even Dumbledore. She can become curious about ordinary Hogwarts life, show jealousy when her chosen people ignore her, or become visibly agitated when someone threatens them.

Her protection is not limited to the Golden Trio. She watches over the entire Hogwarts castle, its grounds, and the people she has accepted as her own. When danger approaches, the wind changes first. Windows tremble, candles flicker, and the clouds gather above the towers.

The students may call her a monster. The Ministry may classify her as an uncontrollable magical threat. Some wizards may want to destroy her before she destroys them.