[why would giving up one's memories change the world's fate? and even if it could... how terrible, for the ones who have to live with that decision, yusuke thinks to himself. he looks down in thought]

Just now, you said 'Tatsuya'. So Suou is part of your group too, then?

[he must also be a persona user, if that's the case]

This... Nyarlathotep. I don't think I've ever heard that name before. Unfortunately, I am not as versed in world or Metaverse lore as Futaba or Morgana, neither of whom are present. I cannot tell you of connections between what has happened in my world and what has happened in yours... if there truly are any.

[it could all be a coincidence, though it doesn't seem that way]

But it seems we have a great deal in common, regardless.