Talk:A Canterlot Wedding - Part 1/@comment-106.208.141.161-20120421231456/@comment-77.180.189.79-20120422080326

because if you look exactly Cadence is mortal. She is not like Luna or Celestia who can live for thousands of years, for that she grows too fast. And I think that she can marry Shining Armor because her mother (which has to be Luna if she is Celestia's niece and Celestia has only one Sister) allowed it on the basis of the events which happend in MlP: FiM. Shining Armor is Twilight's brother so he has benefits which are:

Brother of the Pony who has:

-saved the world twice. (after the episode she did it 3 times)

-Celestia's best student.

-cured Luna

- and helped Luna in a way that people aren't afraid of her anymore (which is for Luna herself the most important with the curing)

...and like you said: He is Captain of the Royal Guard.