DUDE, i warn you, NO, RATHER, I BEG YOU........(crying!!), PLS DONT MAKE ME QUIT DRAWING. i'm trying my best to catch up on the level you reached ten years aga, and YOU ARE DESTROYING MY MORALE WITH ALL THESE AWESOME ARTWORKS THAT MAKES MY STRUGGLE FUTILE( for crying out loud LOL)
I see the suit and the design of the mecha and I think she might be a member of some sort of flight-team for acrobatics, racing, or something. The flight suit suggests the design is more for show and fashion than for military application. That aside, it also seems the suit is completely like a typical protective suit.
I imagine the flight suit is designed to compensate for g-forces, protect the pilot when rocked on a particularly hard maneuver, and to keep the pilot safe if they ever have to abandon their mecha. I'd wager with the design just the basics are covered. Climate control, maybe low-level life support to protect the pilot from exposure to toxic fumes from a downed mecha, the g-compensation, perhaps buoyancy mods for water landings, and a locator beacon.
Looking at the flight suit and mecha, I wager she flies for a higher-latitude team, where it is cooler, and possibly flying high-altitude or coastal shows.