Along with his protocol droid companion C-3PO , he joins or supports Anakin Skywalker , Luke Skywalker , Princess Leia , and Obi-Wan Kenobi in various points in the saga .
Along with his droid companion C-3PO , he joins or supports Anakin Skywalker , Luke Skywalker , and Obi-Wan Kenobi in various points in the saga .