As ever, no such thing as a free lunch in this story.
âHe was able to use Kindness in rapid succession because that protective wall existed. So it was like giving aid to oneâs enemies, though Iâm sure she hadnât intended thatâ â this seems to have intentionally been left vague in the original. So who is âherâ in this case and where did this âprotective wallâ come from? Given that Reise refers to âherâ specifically and âgiving aid to oneâs enemiesâ, this couldnât be D or Sariel. So the only other âherâ known to be capable of doing such a thing and who would be regarded as an enemy is Shiro.
So what is this protective wall and where did it come from? If you refer back to chapter 246, we see this: âThe little trick Iâd prepared earlier was for protection on senseiâs soulâ. This was a protective barrier Shiro put around Oka-chanâs soul to prevent Potimas from infesting her soul again with his soul parasites. Itâs possible that Shiro applied this protection to others, though I canât find a direct reference.
Perhaps the more likely explanation is due to Shiro intending to protect the reincarnators and some others when she collapses the System. In chapter 269 Shiro says âI will expand the Systemâs soul sheltering functionality, improving it so that at least the reincarnators can be saved.â We never get the details of how this was implemented though, but given that it is something intended to survive the collapse of the System itâs reasonable that Shiro set up something in advance to protect or reinforce the souls of certain people. If so then Reise is saying that it also helped Shun use Kindness in rapid succession and without it Shun would have collapsed much sooner and perhaps have already destroyed his soul. This would also mean that if/when the System collapses that Shunâs soul would also collapse.