That blue lock reacts that y/n is Ai hoshino to her children and the father of her children and her death and that they find out who killed her asoa is the father of Aqua and ruby please pliss
Age difference is pretty common once you're adult, 5 years is kind of the norm. For exemple I have my aunt who remarried with a man 15 years older than her and they love each other. My parents too have 5 years age difference. And the sister of my grandmother was married to a man 50 years older than her (it wasn't out of love but that still count), and no this isn't a joke.
Kanae and shinobu d3ath can explain why kanao not with her again and they said like 'her eyes!? ' i dont know but it's about kanao eyes during the battle