So those two are part of the basic course, but have a white vest because they are nobles. All special classes have a gold trimmed hat, and the two nobles from the spy class no extra features compared to their classmates.

So i guess the girl in the all white uniform is also in the basic course, but of higher status than the nobles with just a special vest?

'Other plebeians...'
How to start rigth with the rest of the people... not this way