Sgt Schwarz doodles

As part of my Degree Major project, I designed an armoured train full of misfits, but the actual occupants were just 'name, occupation & main personality trait'

Sgt Schwarz is the armourer/mechanic for the Tundra Rats, responsible for keeping everything working and patching up any battle damage.
She got assigned to the Rats for putting a bunch of drunk junior officers in the med bay, but the details are sealed.
Sgt Schwarz comes from the north of the country, so she isn't really botherd by the cold; on the other hand she is not at home in the heat, so built herself an experimental air conditioning system.
She's also the undefeated arm-wrestling champion...