Mr Ollivander

Mr Ollivander (first name unrevealed) runs Ollivander's, a prestigious shop which sells magical wands in Diagon Alley. Despite the popularity of his wares, he has shown that he can easily name the materials and attributes of several wands he has sold over the years. In Philosopher's Stone, Mr Ollivander assists a young Harry Potter in selecting his first wand (31 July 1991, Harry's eleventh birthday) — or more accurately, according to him, finding a wand that would select Harry. Finding Harry a "particularly" difficult customer to match, Mr Ollivander finally selects an eleven-inch-long wand made of holly containing a phoenix feather (later revealed to be that of Albus Dumbledore's companion, Fawkes), which is perfectly suited to Harry. Mr Ollivander seems very thoughtful that the two should be matched, revealing that the phoenix gave one other feather, and that the wand containing the other feather now belongs to Voldemort. Mr Ollivander tells an uneasy Harry that he believes the world can expect "great things" from him.
Ollivander's appearance in Goblet of Fire was as an official during the preliminary ceremonies of the Triwizard Tournament, where he appeared as an expert judge for the Weighing of the Wands. In Half-Blood Prince, it is mentioned that his shop has closed and boarded up, and that Ollivander himself is missing.
In Deathly Hallows, Ollivander is revealed to have been captured by Voldemort and imprisoned at Malfoy Manor with Luna, with whom he develops an affectionate relationship as the two strive to keep each other's spirits up. He is among those rescued from the manor by Dobby, after which, at Shell Cottage, he provides Harry and his friends with some useful information about the Elder Wand. He later goes into hiding at the home of Auntie Muriel and sends Luna a new wand as a gift.