Shitposting aside, doesn't Nino have like the most clues regarding her being the bride?no Miku or Yotsuba or Ichika or itsuki
For the moment Nino is in reality because she really confess to Fuutarou .Now he knows for her.
In other side
the only person in illusions is Miku and everything goes on only in her mind with all
her fanstame and illusion.
add her unilateral love .>no deep discussion with him.
She does not really know Fuutarou but she idealizes him like fuck.