Kara always had a habit of telling students to be quiet - although surprisingly it was never in a 'rude' way. Her formal quote was "Do not fear the core of your being, embrace it." and she mentioned "Shadows" a helluvalot
Asha had an ongoing thing where she and Thurion would say "Glowsticks and Space Magic" (eg Lightsabers and the Force) :') She also fondly referred to children as "Little One"; her formal quote was "I have killed many, but saved thousands more..."
Kyra used Star Wars cusses way too much, mostly "Kriff"

She also said "Just because it's broken doesn't make it useless" a fair few times, or some variant
Jyn had a nasty habit of stating how she "Didn't understand"; her actual quote, however was "Life is not a game, yet I am merely Their pawn"