Yes, she's someone important. Tyrion thinks she has secrets, he's just distractedly horny and dismisses her secrets because of that. She's not just a Septa, a teacher, a hired hand, she's sworn to protect fAegon. She also needs to hide her identity. Once we are in his head, Griff the nobleman calls her Lady Lemore. She's senior enough and important enough to argue back to Jon Connington. Not once or briefly either. She's in on the plan. Not just a hireli