- "See? Keep your head down, say "sir" a lot, and you'll do fine."
He is a Crusader of Spira stationed at Besaid along with Gatta. Luzzu was close friends with Wakka's brother Chappu, and it was he who convinced Chappu to join the Crusaders and fight with a Machina weapon during a battle with Sin that caused Chappu's death. Shortly before Operation Mi'ihen, Luzzu admits this to Wakka and gets punched leaving Tidus to hold Wakka back (Lulu, Chappu's girlfriend at the time, was told in advance, and she also hit Luzzu).
Depending on how Tidus advises Gatta before the Operation, the player can decide the fate of the two characters. If the player tells Gatta to fight during the battle, Gatta is killed and Luzzu goes back to Besaid. If the player tells Gatta to stay behind, Luzzu will die.
If Gatta is killed, Luzzu can be found beside the temple at Djose. A cutscene will ensue, in which Wakka attempts to convince Luzzu to go back to Besaid, but Luzzu just lashes out at Wakka and shouts at him that he doesn't know what it's like. Wakka then reminds him that he, too, has lost someone dear to him (Chappu), after which Luzzu calms down. If Luzzu is killed, Gatta will say that he found his body, albeit torn in half.
Luzzu is neither seen or mentioned in Final Fantasy X-2, as the game has no way of knowing whether he lived or died in Final Fantasy X.