Well, probably serving as surveillance and commando ground based squads like Navy Seals style? S3 opener starts off with a (not sure what rank) Earth Pony stallion guard busting through the gates to give Celestia the news.
Man~ I really want to make that joke with 12 and 11 that leads to something said at 17 to 16 xD But I'll keep that one to myself!
"Hmm... your inquiry to seek passage into the forbidden gateway shall be taken under consideration."
Some time later the next night...
"Under further evaluations on your marks. We've reach the conclusion that though your words speak of much prowess in your ability to handle the rigorous journeys, proclaiming your ability to travel to and fro many a times without rest, your merits are unfounded and certain testimonies lead me to decree... you simply have not the leg to reach your goal much less provide me the provisions needed to make granting you clearance worth the effort."
huh, come to think of it, i haven't seen any earth pony guards... is celestia biased against earth ponies? lol jk. anyhoo, the guards seriously need an episode for themselves. if one of the cast is a guard could make the story interesting
There's like one earth pony guard... and he was stuck sitting at a train station watching the frozen northern wastes with no expectation of anything ever happening. Dude is really lucky the Crystal Empire returned.
This was easily one of the easiest sketch pages of yours to fave, even had to rethink a moment before I remembered this belonged in the "Sketches" folder, they're so cute/epic/generally emotion inducing. Very glad to see the guard ponies getting some love, they have so much potential. What personalities are hidden behind those stoic, uniform faces? Also, your take on how a frightened Night Guard would look is very interesting. So that is actually their mane? Hmm... oh dear I'm theorizing again. Sorry!