In my headcannon, Alice marries Toppy who’s the Mad Capper’s son. And they fit; eccentric, brave, gentle, jolly, honourable, and loyal. And grand with martial arts. And with animals as well. And into tea. And they wear matching outfits such as cream Panama caps, double-breast overcoats of gabardine, single-breast waistcoats of moleskin with fob watches, ivory-and-vermillion pinstripe shirts with collars open to show ikad scarves, yinyang pendends, bandoliers on satchels, tan jodhpur trousers with tartan symbols, gaiders, and boots.
Also on my headcannon, the MLP ones get invovle. And Rainbow, Flurtershy, the CMC, Fizzlepop, Derpy, Doctor Whooves, the bird buccaneers, Soarin, Daring Do, and the Yougn 6 be there on the wedding.

So her.