Spoiler warning: Plot or ending details follow

Lucca is a character in the 1995 video game Chrono Trigger. Although one of the first people mentioned in the game, the player does not actually see Lucca until after meeting Marle, another important character. In fact, after the opening scene of the game, where main character Crono's mother wakes him up to go to the Millenial Fair, players are asked to enter a name for Lucca as Crono's mother says: "That inventor friend of yours, I can never remember her name..." At this point, players are prompted for the name. The point of Crono going to the Millenial Fair is to see Lucca's new invention, the Telepod. Before Crono can go to the Telepod, he runs into Marle, and they eventually go together. Marle's pendant, which is a relic of the ancient Zeal Kingdom, interacts strangely with Lucca's Telepod, and Marle is sent back in time 400 years.

Lucca is often made fun of behind her back by townspeople, who claim she could see the back of the moon with her glasses. She is also accused of lacking in mechanical skill, as many of her inventions malfunction. This is increasingly disproved throughout the course of the game.

Lucca lives on a small island off the coast of Truce Village, where Crono lives, and which is also presumably the capital of the Guardia Kingdom, of which Marle is princess. Lucca lives on the island in a house with her parents. Her mother remains in the house, having been crippled by an accident ten years before the game takes place. Her father works outside the house constantly, and this causes tension in Lucca's family. Later in the game, she travels back in time to the specific date, July 10, 990, to save her mother.

After Lavos was defeated, Lucca created Prometheus, named/modeled after Robo. One day, they found Kid and Lucca took her in. Lucca set up a orphanage soon after, until Lynx came and killed her.

Lucca uses a gun for her physical attacks. They are somewhat weak in the beginning of the game, but as the player progresses Lucca uses her skill to produce some truly awesome weapons, not only for herself, but also for her friends. When Crono and friends learn to use magic, Lucca's will and determination manifests itself in her mastery of fire.

Lucca has a brief cameo appearance in the beginning of another Squaresoft game, Xenogears.