She looks quite relaxed there
patience, plus more patience. Oh, and do not react when she bites, she will hopefully come to the conclusion that biting is not having the effect she hopes for and will give up.
There are different sorts of bite, playful bites, holding on bites, warning bites and "I am in charge" bites:
Casper loves to sit on my wrist and playfully attack my fingers when I am typing (fortunately he has stopped just now as he has some important preening to do);
if he is on his swing and I want him to be somewhere else (come on its dinner time) but he is content where he is, he first tries pushing my finger away with his beak and when I insist he grabs hold of my finger as he steps up to make the point that he is coming under sufferance;
warning bites can happen when he is on my shoulder - he bites my ear if I move too fast for him to keep his balance, its harder than just a hanging on bite;
fortunately he doesn't attack bite me any more but it would be a silly mistake to get between him and the empty plastic water bottle he is chasing around the room or he will bite some people who invade his personal space, other people he will fly to quite happily - not sure what makes him like some more than others, maybe he senses nervousness and pushes his advantage.