Listed Left to Right: Wildfire by
, Fausticorn by
, Tara Strong's OC, John de Lancie's (unofficial?) OC
There's probably a bunch of other OCs of other crew members on the show, but long answer short I'm just too lazy to look them up. I'm probably guessing someone's going to note how John de Lancie's OC has a filly's nose structure, but in my defense so did Thunderlane's younger brother Rumble.
Original vector of the first three fillies: [link]
Vector used for John De Lancie: [link]
And now for something completely irrelevant: [link]