Maisie Cattermole was a Half-blood witch and a Ravenclaw student at Hogwarts School of Witchcraft and Wizardry in the late 1990s years. She is the daughter of Mary and Reginald Cattermole. She had a brother, Alfred, and a sister, Ellie. She lives at 27 Chislehurst Gardens, Great Tolling, Evesham with her parents, brother and sister.
She was studying at Hogwarts in the 1997-1998 school year, when Professor Severus Snape was Headmaster. In the evening of 1 May, after Snape's ousting, when the school was gathered in the Great Hall to discuss the evacuation of underage students from the Castle because of the battle that would soon ensue, Lord Voldemort's voice sounded through the walls to warn the school that all he wanted was Harry Potter, and that if they did not give him to him, the battle was inevitable. Maisie, who stood in a corner of the hall, started screaming in terror at his voice.