[@Lexicon]

You know I didn't think about that. I doubt it, at least for a lieutenant. I'll say captains and above have some sort of signifier, though, which I'll come up with soon.

EDIT: We're going to go with something straightforward. One horizontal bar patch on the shoulder and chest signifies a captain, and with each additional patch [probably made of gold cloth] a higher rank is signified. Two for major, three for colonel, four for general. The patches are ~four times wider than they are tall, so this means Claes just has a big gold square on her chest and shoulder.