Katie will continue to be aggressive during this period, so you should be VERY careful handling him. I am calling Katie a him because I suspect Katie is a male. From your earlier posts about his behavior in August when you first got him, and the fact that he was courting you as well (regurgitating on your cheek) leads me to think that Katie is in fact a male.
Asking Katie to step up now is just not going to work. he will refuse you. in his mind, you are just an interference to his courtship. handling him could be - and I should have mentioned this in the last post actually - very dangerous right now if you don't know what you are doing. the good news is that Amazons are "what you see is what you get" birds, unless someone has overtly physically abused the animal and forced it to exhibit confused body language.
so the best advice I can offer you at this point, for your own safety and for the future of your relationship with Katie, is:
1. take him to the avian vet and get him sexed, through a blood test.
2. ask the vet about Amazon hormonal surges, and he may be able to advise you on how to control your environment to minimize hormone levels in your bird (usually less light helps. he may have more tips).
3. read up on bird body language, esp. Amazon body language. A good place to begin is Greg Glendell's excellent book "Amazon Parrots". get a hold of every book you can on Amazon parrot body language. some of the older books don;t talk about this enough. but theyre still worth owning for whatever other tips they can offer you.
4. from this second onwards, watch Katie's body language VERY CLOSELY. don't push his limits. stay away when you see the signs of aggression. reward calm behavior. its going to take a lot of close observation on your part to basically TRAIN him to be sweet to you - you will be working toward the long term goal of overriding his natural aggression (caused by courtship or whatever) with the conditioned response of good behaviors taught through positive reinforcement.
5. don't handle Sonic in front of him. in his mind, you are courting his love interest. he will resent you for it.
I am not entirely sure how this will all play out in your household, given the number of different birds that are living in your bird room, each one with a mind of its own, each one wondering where it fits into the flock, and the larger scheme of things. you are going to have to watch all your birds body language very closely to prevent Katie's aggression from affecting them. the fact that Katie "grabbed Sonic's neck" as you mention in the previous post is a sign that he is capable of displaced aggression. so you should put a folded quilt over his cage when any other bird is out so that other birds dont get their feet ripped off if they land on Katie's cage.
there are a lot of little things like this that you will have to work out to ensure sound flock dynamics, and safety for yourself and for your other birds. its going to be challenging with so many birds, of different species, different ages, different backgrounds, different sexes. research as much as you can about parrot aggression and behavior, and don't handle any of your birds casually like pets, but rather, as displaced wild animals that each have all their natural instincts intact. each action with your birds should be premeditated, for your own safety.
I commend you for your kind heart in taking all these lovely darlings into your home, and I believe that things will eventually work out for the best for all of you.
