Gorgeous yellow diamond ring. We've never read anything about Alexandra's relationship with her father...it's telling that she's spent her life in Monaco. I haven't read anything about EA and Alexandra on bad terms, Alexandra and her mother have kept her life private, good for both.
EA may show for her wedding, if invited. If not, then one of her brothers or Albert may give her away. I think Albert and his niece have a good relationship.

I don't think they've lived together since she was a toddler. The parents were separated soon after, though they are still legally married. EA avoided both sons' weddings. I seriously wonder if he's well enough to travel, given his history.

I hope she wears a Hannover tiara. She's entitled to wear the tiny crown, too. I look forward to all the photos.