Gollum
Gollum is a fictional character from J. R. R. Tolkien's legendarium. He was introduced in the 1937 fantasy novel "The Hobbit", and became an important character in its sequel, "The Lord of the Rings". Gollum was a Stoor Hobbit of the River-folk, who lived near the Gladden Fields. Originally known as Sméagol, he was corrupted by the One Ring and later named Gollum after his habit of making "a horrible swallowing noise in his throat".
Bilbo Baggins
During his journey, Bilbo encountered other fantastic creatures, including Trolls, Elves, giant spiders, Beorn (a man who could change into a bear), Goblins, Eagles, Warg, and a murderous creature named Gollum. Underground, near Gollum's lair under the Misty Mountains, Bilbo accidentally found a magic ring of invisibility that he used to escape from Gollum.