Lucca

Lucca is a character from the SNES and Nintendo DS video game Chrono Trigger. She is an inventor and was a friend of Crono since they were children, and thus lives in the same era as him in the game. She creates many machines and robots, and while she didn't construct Robo, she did make a minature version of him in the end of the game and throughout the story the two are very good friends and partners. Because of one of her inventions that allows you to travel through time, she, along withe everyone else in the group, can be credited to saving the world.