User blog comment:Xilinoc/Ch. 565 (Mangapanda is run by lazy barnacles)/@comment-24282510-20140124225706/@comment-1771627-20140126120742

Remember Loyd and Royd were already born with their powers, it was not stated that they were born in a quincy family, so i think that both can happen (boost existing powers or giving new ones). But I have one theory: Kubo is yet to explore what Orihime trully is. What about there's a special class of humans that are born with powers? This would include Orihime, the twins, even Ywhach himself. Also every quincy with special abilities were just special till Ywhach came to them and made them quincy, recruiting his new SternRitter.