Oswald Rabbit is the major deuteragonist of the Kingdom Hearts Unlimited fanfiction series, taking the role originally played by Riku. Oswald has not appeared in the canon series so far, but thanks to the powers of symbolism, he can take on a role which will change his life forever.
He is a Keyblade wielder that has the power of Darkness, and is always ready to sacrifice himself to protect his friends. As Mickey's oldest and most dearest friend since childhood, Oswald sees it upon himself to help make their greatest wish come true, but pulls all the wrong moves to do so, succumbing to the darkness in his heart and becoming more arrogant and power-hungry as the journey goes along, ending with his possession at the hands of the Horned King's malice. It is only by a miracle that Oswald is saved from this terrible fate and begins a long journey to redeem himself for his actions. Finally, when almost all hope is lost for him, he finally embraces the balance of light and darkness that makes up the worlds, becoming a true keyblade master through the long-delayed ceremony conducted upon him by his predecessor, Anakin Skywalker.