hmmm, pretty sure it would've been better for the story if Roy's tale was more that the 4 of them held back & defeated the DKs bodyguards while their 5th, Abel, was able to take on and defeat the Demon King (or something to that effect). That recap sounds more like they sat there and watched Abel, which would be pretty lame setup of the author. No reason to make the 4 that are specialists (because of their innate talents, shown by eye color) window dressing for the generalist (genius though he may be).