Radagast

Radagast, also known as Aiwendil  was the ruler of Rhosgobel and one of the five Istari wizards who came from the Valar. He was also a very close friend of Gandalf, who referred to him as a "cousin". He played crucial to the events in the battle of Dol Guldur and the Battle of the Five Armies.
== Biography ==
In the distant past Radagast, "Master of Shapes", had taught the ancestors of the Beornings the art of skin-changing. During his stay in Rhosgobel, Radagast had come across Gollum who was stealing and eating the babies of the Woodmen and banished him from the Vales of Anduin, causing Gollum to crawl inside the caverns of the Misty Mountains. In early T.A. 3018, Radagast, on his way to see Saruman, visits Grimbeorn and bids him to send one of his children with a message for Aragorn in Bree-land.
Radagast is first mentioned when Bilbo Baggins inquires of Gandalf whether there are any other wizards within Middle-earth. Gandalf responds that there are five wizards, of whom Radagast is one. Gandalf says that Radagast is a great wizard in his own particular way, also calling him a kind-hearted individual enjoying the solitude of standing guard over the Greenwood forest and preferring the company of animals to that of Men.
Radagast is then seen investigating the Greenwood, noticing that much of the vegetation is beginning to decay and much of the animal life is sick or dying. Radagast brings one of them, a hedgehog he calls Sebastian, back to his woodland house at Rhosgobel where he is able to nurse the hedgehog back to health. Radagast comes to the realisation that a type of powerful witchcraft has caused the decay of the Greenwood and its transformation into what would now become known as Mirkwood. After Rhosgobel is swarmed by Giant Spiders and manages to save Sebastian, Radagast investigates and identifies the origin of the evil as the supposedly abandoned fortress of Dol Guldur.
Radagast makes his way to Dol Guldur aboard a sled pulled by Rhosgobel rabbits. While Radagast is investigating Dol Guldur, he is attacked by the spirit of the Witch-king of Angmar. Radagast is able to ward off his attacks and forces the Witch-King to drop his Morgul-blade and retreat. Radagast takes the Morgul-blade, but before he leaves he sees a shadowy figure within the fortress, whom he believes to be the Necromancer.
He immediately goes on the search for Gandalf to inform him of the new found threat within Mirkwood and is able to locate him within the Trollshaws accompanying Thorin and Company. Radagast tells Gandalf of the threat the Necromancer is posing to Middle-Earth from within Dol Guldur and presents the Morgul-Blade as evidence. Shortly afterwards, the company is attacked by a battalion of Warg Riders led by Yazneg. Radagast volunteers to create a diversion with his sled of Rhosgobel rabbits, drawing the Warg Riders away from Thorin and company, who are able to reach the safety of the Hidden Valley of Rivendell. Radagast's rabbit sled's superiority in speed and maneuverability allows him to escape the Warg Riders before they are driven off by elven horsemen led by Elrond.
At the White Council meeting in Rivendell, Gandalf backs Radagast's claim that the Necromancer posed a serious threat to Middle-earth. But the head of the White Council, the white wizard Saruman, remains skeptical and claims there is no evidence to support such a theory despite Radagast's finding of the Morgul-blade. Saruman furthermore suggests that excessive consumption of mushrooms has addled Radagast's judgement and reduced his reliability.
Radagast (who was presumably instructed by Galadriel) meets Gandalf inside the High Fells of Rhudaur and they find the tombs (or cells) of the Nazgûl broken into by 'dark spells'.
Radagast became skeptical of Gandalf's beliefs that the Necromancer summoned the Nazgûl to Dol Guldur, believing that no human sorcerer could accomplish this. However, Gandalf reminded him that the Nazgûl only answer to their one true master, Sauron, whom he suspects is the true identity of the Necromancer. Realizing that Sauron plans on attacking the Lonely Mountain, Gandalf attempts to leave to rejoin Thorin and Company, but Radagast insists that they investigate Dol Guldur themselves assuming what Gandalf believes is true. Upon arriving at the seemingly abandoned fortress, Gandalf guessed that a spell of concealment had been erected over the place, suspecting that their enemy has not regained his full strength. Gandalf sends Radagast to take a message to Lady Galadriel while Gandalf continues his own investigation of the 'abandoned' fortress. Before Gandalf goes in, he has Radagast swear not to save him should anything happen, especially believing it to be a trap.
Radagast is seen chanting an incantation, seemingly a telepathic communication to support Gandalf as he attempts to break free from his cage. Later, he arrives at the Battle of Dol Guldur where he takes Gandalf to his sled, by the order of Galadriel. Radagast provides Gandalf a horse to ride to Erebor and his Wizard Staff to replace his old one. Gandalf tells Radagast to summon every bird and beast to join in the battle for the Lonely Mountain. Radagast leads a charge of the Great Eagles at the end of the battle to assist the Dwarves, Men, and Elves. He rides one of the eagles (possibly Gwaihir) along with Beorn.
The characters Eradan, Farin and Andriel travel to Mirkwood in search of Radagast and arrive just in time to rescue him from the Spider Queen, Saenathra. He thanks them for the rescue and provides them with information about the Dragon Urgost.
Radagast is first found in Ost Guruth, a small settlement of men in the Lone-lands north of the Great Road. He is friendly to the local people, the Eglain, and helps them to combat the rise of evil in the swamps of Agamaur. After the War of the Ring, he tasks the player with ways of helping the living creatures around them. Radagast eventually settles back in Rhosgobel now that evil that is departing the forest.