[quote=@Double Capybara]
Is it ok to play a character with a noble background?
[/quote]

Yes you can, but keep in mind that your character will be subject to taking orders from the unit officer--an individual of lower class. In social status your character will be higher in class, but in the unit that won't matter due to rank.

Also, your character can certainly be an aloof jerk due to their class, but don't expect to be able to boss other players around. Just thought I'd add that in.