Since there wasn't any new ponies who debuted in "What About Discord?", I decided that I would do facts Night Glider and Sky Stinger, the former being first:
* She is the first pony to have Rebecca Shoichet as her voice actress.
* She shares her name, coat color, and mane color with a G1 Earth pony.
* She is the fourth pony, and only female to date, who officially has "Night" somewhere in her name, following Night Light (Season 1), Night Watch (Season 2) and Night Knight (Season 3). She is also the last one to date.

You can find some facts about her here