The ponies on the AEC:

Lt. Lofty Loam. Pegasus (batpony subtype, using a disguise talisman) stallion. He is from Maretonia and served in its air force before becoming a line officer of the UOIC at the time he was stored in suspended animation on the Harmony. He was 'defrosted' by Risen Bones Organization. He is admittedly a very poor cook.

May Flower, a unicorn mare. She is from Equestria, specifically the city of Pebble. She likes flowers and hummingbirds, and is a navigational assistant. (Though she is currently also the helmsmare of the AEC most of the time.) She is somewhat reserved but has a mischievous streak that occasionally manifests itself

Rusty Clutch, an earth pony stallion, a junior engineering officer from the Harmony itself who is now working on the AEC. His special talent is fixing things, unsurprisingly.

Oily Feathers, a pegasus stallion. He is a mechanic and apparently also takes care of the auxiliary machinery of the AEC. His special talent is robotics. He is from Western Ponyland.

Golden Twinkle, a unicorn mare, is a specialist in "magical power systems," and is part of the engineering crew on the AEC. Her foalhood dream was to be an astronaut; she describes the reality, probably understating, as "different than I expected."