Oswald the Lucky Rabbit is the deuteragonist of Epic Mickey and a protagonist alongside Mickey of Epic Mickey 2: The Power of Two. He is the ruler of Wasteland and Mickey Mouse's half brother. At first Twilight, Cadence, and Mickey had a hard time earning his trust, but after a few events they finally earned his trust.
At first he didn't get along with Micky even though he was considered his half brother. Reason why is because of Mickey taking his popularity since he was created.