Marrying an NPC would be a little weird for some people who've already gone and done the whole Eternal Bonding thing.

I can see something like this happening on a Valentione Day event, where we don't essentially marry an NPC, but we get the chance to "date" them for a time, thus opening up new doors to deeper lore, or a backstory behind said characters. If that were to happen, I wonder what NPCs would be available. Would they allow us to chase after NPCs we met in the main story? Or would they introduce exclusive NPCs for said event? So many possibilities.