[In processing the memories, it was difficult, sometimes, to determine the emotion he ought to feel while 'reliving' them. They played in his mind like a movie clip, but given that he had never actually been there, the accompanying emotions were all freshly applied, taken from the cues he could gather from the scene. In this case... the heart-wrenching despair of Minako's friends were just about enough to tell him what was really going on.]

But the only way to attain that miracle...

...Your brother's Persona. When we fought at the Tournament together -- It was 'Messiah'.

[It was not a difficult guess to discern that, if Minato was dead in Minako's timeline, the same held true for her brother. And so... in any world where one of them lived, they would have this role to play.]