Who is He?

Gandalf (Norse; IPA: [gand:alf] - "Elf of the Wand" or "Wand-elf") the Grey, later known as Gandalf the White, and originally named Olórin (Quenya; IPA: [oˈloːrin] - "Dreamer" or "Of Dreams"), was an Istar (Wizard), dispatched to Middle-earth in the Third Age to combat the threat of Sauron. He joined Thorin and his company to reclaim the Lonely Mountain from Smaug, convoked the Fellowship of the Ring to destroy the One Ring, and led the Free Peoples in the final campaign of the War of the Ring. Originally called Olórin, he was accounted as the wisest of the Maiar (with the possible exception of Melian). He was created by Ilúvatar before the Music of the Ainur[1], and was at the beginning of Time amongst the Ainur who entered into Eä.[2] In his "youth", he became one of the Maiar who served Manwë, Varda, Irmo and Nienna named. He was associated with light and fire, much like his peer Varda.[3] Yet his ways often took him to Nienna, from whom he learned pity and patience. He loved the Elves, but he walked unseen among them, or wore a fana that appeared like an Elf, and sent them fair visions in their hearts that made them wiser. Throughout his existence, he followed the example of Nienna, he took pity on the sorrows of the Children of Ilúvatar and drove those who listened to him out of despair.[3] When the Valar decided to send the order of the Istari (also known as Wizards) to Middle-earth, to counsel and assist all those who opposed the Dark Lord Sauron, Manwë and Varda decided to include Olórin among the five who were sent. At first, Olórin was nervous and described himself as too weak and too afraid of Sauron. Manwë understood, and told him that was one main reason why he should go - to overcome that fear. Furthermore, the One Ring, which held much of Sauron's power, presumably still existed somewhere. Thus, Manwë insisted that Olórin should go as the third, but Varda convinced him to have Olórin go as the second instead.[4] He agreed, and prepared for his departure from the Undying Lands with the other four, arriving about the same time the Necromancer appeared in Mirkwood.