He's a scion of the upper-class Took family, and by the time he retires from "adventures" he's had several. Gentleman Adventurer: In contrast to his attitude in The Hobbit.Bilbo is the son of Bungo Baggins son of Mungo Baggins son of Balbo Baggins. Eccentric Mentor: He is this to his nephew Frodo, much to the despair of the majority of the respectable hobbits of the Shire.Bilbo Bolsón in Spanish ("Bolsón" meaning something like Bigbag"). Dub Name Change: "Bilbon Sacquet" in French became "Bilbo Bessac" in the newer translation of the books.
Direct Line to the Author: He is the in-universe author of The Hobbit, and translated The Silmarillion out of Elvish.Decoy Protagonist: Going solely by the first chapter, one could easily assume that Bilbo was the central character, until the focus shifts to Frodo in the second.Cool Old Guy: He's 110 years old at the beginning of Fellowship, and fond of entertaining young hobbits with tales of his adventures and giving out gold as a party favor.Benevolent Boss: To his gardener, "Gaffer" Gamgee (Sam's father).Because Destiny Says So: Why he found the Ring in the first place, according to Gandalf.See The Hobbit character sheet for tropes that apply to him in that work. Years later, Frodo meets Bilbo again in Rivendell, where he has retired.
Frodo's "uncle" (really his older cousin) and father-figure, Bilbo's 111th (and Frodo's 33rd) birthday opens the story Bilbo, feeling the Ring's effects on him, leaves the Ring to Frodo and sets out on his last adventure. The main character of The Hobbit, who inadvertently sets The Lord of the Rings in motion with his discovery of the Ring.