Yuiyui would be very delighted and happy to be at her daughter's wedding (mostly because grandkids), while Hyoizaburo would be crying tears of pride and joy. I'm sure he and his new son-in-law would be great drinking buddies.
Komekko would be a mischievous aunt that's really an older sister figure.
How many of you are willing to bet Darkness would be a great babysitter, while Aqua... wouldn't?