This probably won't be popular, but I think she needs to clip a few flight feathers. Pooka (LSC2) is an awesome bird, but when he is flighted for a long period of time, he is a menace. He goes after the other (much larger) birds. He bites, hard. We let his wings grow out and give him an opportunity to fly, but the second his attitude shows up, he gets a few feathers clipped. This has been the only answer to the behavioral problems. If we were home all time, I could better manage the 'out' time. However, even when the others are contained, he will fly to their cages or go after them on a swing or gym. He's already had a really bad bite from one of the macaws (he was the aggressor) and is missing 3 toes (not from any interaction from another bird). We don't want to lose any more.
I wouldn't even call Pooka's behavior aggressive. It's more a case of "everything within my line of vision is MINE" and a sort of delight that he can make the other birds react. Kirby is terrified of him. The others avoid him, but if he doesn't back down, they will bite.