Spitfire

SPITFIRE (alias "White Hen") - Pegasus. Mission medic, Amicitas Flight 3. Recently promoted to Major, Equestrian EUP (national military/guard forces). On leave from commanding the elite Wonderbolts flying team. Although trained as a reserve astronaut, Amicitas Flight 3 is her first-ever space flight.

Facts
Pegasus

Medic

Dietary requirements: Vegetarian

Responsibilities:

Health of crew

Magic fatigue spotting and prevention. Sol 12

Suit drills

Leak spotting

the only member of the crew with no space flight experience

Motivation
In the story, Spitfire's story arc is her need to feel needed. When she starts off, she's bummed because she's gone from being in command of the Wonderbolts to being the oldest and lowest-ranked member of the crew, put in a role she's only marginally qualified to fulfill, and deprived of her single greatest natural talent (flight). By the end of the story she's saved the mission at least twice, grown into her duties, and established herself as equal to the others, but at the cost of losing her competitive edge (and possibly other long-term health issues, hinted at but not addressed in-story).

(Incidentally, the majority of the reason why she continually rode Starlight on health issues was so she could feel like she was doing something positive. Patient = purpose.)

(and her feeling of being the least qualified member of the crew is why she was the most sensitive on the subject of being talked down to / infantilized by Mark.)

Finally, her other major struggle throughout the story is in learning and speaking English. Starlight, Cherry, Dragonfly, and to a lesser extent, Fireball all pick up English fairly quickly, but not Spitfire. Even late into the story, her English sentences are somewhat stilted and not perfect.