Yu Hayakawa is one of the main characters in Final Fantasy: Unlimited. At twelve years of age their parents, the geologists Joe Hayakawa and Marie Hayakawa, left their island home of Sadoshima in Japan for their second trip to Wonderland. He is one of a set of twins, with his sister Ai Hayakawa being the second of the set. He is the more impulsive of the pair, and the more trusting, as seen in his attempts to befriend Kaze. Early in the series he finds a hair clip with a chocobo feather in it, and by wearing this he can feel the emotions and desires of chocobos he encounters.