Prompt: Lies
Rose is excellent at hiding what she is feeling from the people around her—the way she kept her love for Dimitri under wraps for such a long time is proof of that. She's even gotten better at hiding her anger away behind the stoic guardian mask she finally mastered. So no one—except Dimitri, of course—realizes how much it infuriates her to hear people speculating about Adrian Ivashkov and his extended absence from court.
Every time she hears some spoiled Moroi suggesting that he finally lost his mind and had to be locked away, or snidely commenting that Nathan Ivashkov must have checked him into rehab, she has to fight back the urge to physically lash out at them. The only way she's managed to refrain from making them retract their slanderous lies is by memorizing the face and name of each and every person she's heard spreading rumors against her friend. This may seem like a strange form of anger management, but it works; it's actually just a tactic she uses to hold the anger at bay for the time being. She knows that eventually, she'll be able to take action against them, making them eat every hateful word, and that's enough to mollify her.
She's just biding her time, waiting for the day the Moroi traitors behind the attack on Jill are caught and the truth of Adrian's whereabouts can finally be revealed. When that happens, she plans on making every single one of the gossip spreading Moroi scum apologize to Adrian's face under threat of bodily harm—and she can't help but hope that at least a few of them resist so she can punch them in their smug, condescending faces.