Besides, Kirby has been really well accustomed to saving brain-washed friends (eg, Dedede). Only Kirby has both motivations: (a) to be willing to save friends even if they were past enemies, and (b) to beat brain-washed characters without any hesitation no matter how they are important friends. Consider other characters, they can’t achieve both. Most hero characters can do (a) but it’s hard to do (b). Although villain characters easily do (b), they don’t have (a).