Well it's nice that for once it's not so much the protagonist pulling a new power out of their ass, as realizing other people can do what he's doing but better and thus move to learn from that.
Well, that's one hell of a foreshadowing of Sauro's singlemindedly selfish nature. I get the feeling after all the emphasis that those two kids got, we're gonna see the aftermath of one of them being killed because of his choice.
@nbhstcqbvvpmacjrmv He's probably intending to "go down with the ship" so to speak, he's forced into a role he wants nothing to do with and hates himself for now.
I actually wouldn't be surprised if Johann went off the deep end more because of a superiority complex and he probably killed Sumire himself when she disagreed on something or refused to join, given his mercilessness towards other Oracle users that don't cooperate with him.
Even the past arc showed Yamori's obsession with love reaching the point that he'll willingly play matchmaker. Everything keeps tying into the central theme that he's trying to understand love, despite his warped lacking sense of it.