Ring-bearer
Ring-bearer is the title given in The Lord of the Rings to one who carries the One Ring. Most particularly it refers to Frodo Baggins, the hobbit of the Shire who takes up the burden of bearing the Ring to Mount Doom to be destroyed. The term also applies to others who have held the Ring, including Bilbo Baggins, the creature Gollum, and, for a brief time, Samwise Gamgee.
To be the Ring-bearer is to carry not merely an object but a crushing spiritual burden, for the One Ring weighs ever more heavily on its bearer the closer it comes to its master in Mordor, wearing away the will and tempting the heart.
The burden
The One Ring exerts a corrupting influence on whoever carries it. It prolongs life unnaturally while stretching the bearer thin, as it did to Bilbo Baggins over sixty years and to Gollum over centuries. For Frodo, the burden grows heavier as he nears Mount Doom, until the Ring becomes a torment of weight and an ever-present temptation. The bearer must resist the Ring's constant urging to claim its power, a struggle that no one can sustain forever.
Notable Ring-bearers
The first finder in the modern tale was Gollum, who held the Ring for centuries beneath the Misty Mountains. Bilbo Baggins found it in the events of The Hobbit and bore it for many years before passing it to his heir. Frodo Baggins is the Ring-bearer of the great quest, chosen at the Council of Elrond to carry it to its unmaking. Samwise Gamgee briefly bears it in The Return of the King when he believes Frodo dead at Cirith Ungol, then returns it. For a moment, the wizard Gandalf and the lady Galadriel are each offered the Ring and refuse it, knowing they could not resist becoming new dark lords.
Significance
At the end of the tale, the surviving Ring-bearers, Bilbo and Frodo, along with Sam in his own later time, are granted passage over the Sea to the Undying Lands, a grace given in recognition of the wounds the Ring left upon them, hurts that could not be healed in Middle-earth. The figure of the Ring-bearer is central to Tolkien's vision that the gravest burdens may fall not to the mighty but to the small and humble, and that even the truest bearer is in the end saved as much by mercy and pity as by their own strength.