It wouldn't be the first time I was wrong, but she really sounds like a he- the dominance, waddle pulling. They're abt 6 months old..
I had to go back & look at that time period. Mine had paired off by then, mb not so much as mates but pals & sleep mates. One pair, he was docile,letting the other peck holes in his foot until I ended up having to amputate it - but he never fought back or moved away.
Yet he & the rest, male & female, would pick on the lighter colored lavender one, chased him all over the yard constantly.
Then came the macho fights, between the lavender and the amputated toe male. They were the only 2, and still are, that fight. It's grueling to watch, grabbing the waddles then running as though they were yanking on a leash, pinning each other against structures.
When the lavender gets too annoying, you'll still find him running full out with the other 5 giving chase.
But- 4 of mine are in their 2nd year, 2 are 3 months old. The 4 older ones I bought & raised, & though not as cuddly as they were when younger, they're still tolerant of my touch and being picked up, as well as eating out of my hand. These 2 female keets that I hatched would rip my face off if they could.