Name: Olympe Maxime
Age: Unknown.
House: N/A. Presumably she attended Beaxbatons.
Distinguishing Characteristics: Madam Maxime is a half-giant, and hence the largest person Harry has ever seen with the exception of Hagrid. She is in fact (in Harry's opinion) almost exactly the same height as Hagrid.
Heritage: Half-giant.
Family: Unknown.
First Mention: Chapter Fifteen of Goblet of Fire.
General: Madam Maxime is the Headmistress of Beauxbatons School of Witchcraft and Wizardry. She makes her first appearance at Hogwarts when arriving with her entourage for the Triwizard Tournament of 1994-95 in an enormous flying power-blue carriage, pulled by Abraxan winged horses.
Her immense size apart, she is a powerful woman in many ways. She is respected by Dumbledore (and perhaps even grudgingly by Karkaroff) and doted on by Hagrid while inspiring a sense of wonder in most people who see her. It's not hard to work out why: She is graceful despite her size (and reputedly an excellent dancer), with handsome olive-skinned features, huge black eyes, and sleek hair drawn back from her face. She dresses from head to toe in black satin and is laden with opal jewelry. She even speaks excellent English, albeit with a strong French accent.