"My Little Pony: Friendship is Magic" & Original Characters © Hasbro
I'd like to propose Optics, with Derpy!
I love the expression as she's looking back at the damage,
This is a pretty textbook reason why most hazardous materials suits are kept at positive pressure and the work spaces in the labs are kept at negative pressure- so if there are any holes the contaminants are blown away.
I would have loved Rarity as a geologist
What about other non mane 6 ponies for other fields: Sweetie Belle for acoustics, Luna or Celestia for astronomy ...