Of all the Eclectus I have, not one has ever done it and I have taken eggs and babies from them, which should provoke an attack if a bird were ever going to do it. I almost never give up trying to keep a bird in its original home, but in this case, I am afraid your daughter could be injured and perhaps even lose an eye. It is not worth the risk, in my opinion, so if you can share the bird with a friend with the idea of taking her back when your daughter is older, that might work. Otherwise, you probably should try to find her another good home, but definitely a home without children and without the possibility of future children. You must let any prospective new owner know about her aggression problem with your daughter.
Birds have definite likes and dislikes and they can be really jealous as well.
Best of luck in relocating Mattie. If the bird is out, I can't leave the room at all because my daughter does have free rein of the house. Last weekend my daughter took a nasty bite to the face while lying on the floor. It is rare for a female Eclectus to actually fly at someone to attack them. Of all the Eclectus I have, not one has ever done it and I have taken eggs and babies from them, which should provoke an attack if a bird were ever going to do it.