User blog comment:Xilinoc/Ch. 632 - friend 2/@comment-10301320-20150625115049/@comment-11051098-20150625143123

If he turns out to be the expected "The Balance", maybe he possessed a fraction, or basis, of that power from a young age, and it was The Balance that (even unconsciously) made him seemingly unaffected by Yhwach's reiatsu by balancing it out.