Night Glider Theory

During Testing Testing 1, 2, 3, we got the names of a few famous Wonderbolt commanders, such as General Firefly and Admiral Fairy Flight. Among the names thrown at Rainbow Dash (and the audience) was a commander Easyglider, a pony who was responsible for creating a lot of the choreography used by the Wonderbolts, both then and now.

That is the extent of what we know about Easyglider, other than the fact that the costume worn by commanders at that time was awesome. We don't know when Easyglider's reign as commander took place; we don't know what happened to them; strictly speaking, we don't know Easyglider's gender (though I'd imagine it's safe to assume Easyglider was female, considering Twilight stood in for her during Rarity's boutique).

Fast forward to the season five premiere. Twilight Sparkle and friends investigate a strange town, filed with ponies who have given up their cutie marks and replaced them with equal signs. At the end of the episode, the mane six need help retrieving their own cutie marks from Starlight Glimmer, and are aided by a group of ponies- the "Elite Four".

One of these ponies is a pegasus who goes unnamed throughout the episode, but who the credits identify as 'Night Glider'.

As with Easyglider, we don't know very much about Night Glider. We don't know where she comes from, or how she came to be in Our Town; as a result, there seems to be a lot of gaps that can be filled in with fanon.

So, my theory: Night Glider is related to Easyglider. During the chase with Starlight Glimmer, we didn't get to see much by the way of choreography or flying skills, but then, that was a chase, not a stunt show. Even so, we do see her and Double Diamond performing a dive bomb stunt involving her dropping him so he can cause an avalanche, which would seem to require quick thinking and coordination on both their parts.

Furthermore, Night Glider's cutie mark depicts a moon with two feathers; feathers seems to be a standard symbol for speed and flight, suggesting that Night Glider's special talent is related to... well, night flying.

Now, how does being related to Easyglider lead to Night Glider joining Our Town? I don't know. It could be that her talent wasn't good enough for the Wonderbolts; maybe she felt intimidated by having a legacy to live up to. It's more space for fanon to fill in, and I admit, I haven't quite figured out the details of their relationship.

Still, I like the idea that Night Glider is related to Easyglider so... head canon.

As an added bonus: my last theory related to the Shadowbolts, and my belief that Nightingale, Descent and Other Descent are Luna's imaginary friends, invented by her during her time in exile on the moon as a rival team to the Wonderbolts. If Luna ever decided that she wanted to form a real team of Shadowbolts, who better to lead them than the descendant of one of the Wonderbotls most famous commanders?

Which is something that might tie in quite well, both with Night Gliders name and her cutie mark. They might not be definitive proof, but it's certainly an indication as to why, if she can't, or doesn't, want to join the Wonderbolts, Night Glider might be able to find a role as a captain for the Shadowbolts...