Lucas is the main protagonist of Mother 3. The son of Flint and Hinawa, he is characterized as more timid than his twin brother, Claus. While playable briefly during the prologue of Mother 3, he is an NPC for the first three chapters of the game, with Flint, Duster, and Salsa being the main characters of those chapters. After reappearing in the climax of Chapter 3 against the Pork Tank, he becomes the main playable character after the three-year time skip to Chapter 4, and retains this role for the remainder of the game.

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