A reckless Rebel fighter pilot, unaware of his Force Sensitivity, fighting for his lost family. He threw his life at the Rebellion, wanting to make someone pay for the suffering the Empire had inflicted upon him. Over time, his Flight Leader, and first true friend, convinced him the best thing he could do was live.
Less reckless, more in tune with himself, he began to have greater and greater success within the cockpit of his X-wing. He loved to fly. During his last mission, he realized the truth of his power, while striking a lethal blow against an Imperial station. For the first time, he felt the Force guide him during his attack run, but unfortunately, it frightened him. In his panic, he struck the flaming wreckage of the exploding station, leaving his X-wing a shattered wreck, spiraling toward an uncharted planet.
Surviving the crash, he found himself in a dangerous, uninhabited wilderness and had to learn to live within its confines. He built his home in the treetops, gardened, and through time and trial, learned to live in harmony with the world.
His burgeoning understanding of the Force aided him, gave him faith in his instincts, and slowly, he learned to trust in it. Soon, it brought him friends, in the form of woodland beasts, birds and rodents. He felt their presence in the Force, and eventually, communicated with them, saw with their eyes.
Then it led him to a rival: A great and murderous Varactyl. Three times, they did battle and bled each other. In the third, both near death, their hatred finally became respect. They became lasting companions. Castos could fly once again.
Twelve years he spent on that nameless world, growing stronger in the Force, finally learning to hide himself within its ripples. But not soon enough. He had been noticed. Someone had come.