Is she one of the people used to exhaust healers by being pests with endless needs? Is that how such individuals are corrupted to do so, through direct messages into their minds by extraterrestrial psychics?

Yes, and you are seeing this quite clearly now in the case of this individual, that she is a dual threat, both to herself and to those she turns to feverishly, and wanting to become their problem. It is a genuine quest for relief, but what is atypical is that there is no self-restraint. The frantic continual bombardment of emails and phone calls from her attest to having an impulse to be driven and to prevail on others heavily, to do something, do anything, yet when she is told all has been done that is possible, she will not stop. She will come back and ask for more. That is what is unnatural here and a tipoff that she is being manipulated to become a kind of pest, even though her needs are genuine. You, indeed, are doing all you can in having the Lightworker Healing Protocol addressing the interlopers who are keeping this game going. That is all that you can do, to ask for divine intervention to deal with the perpetrators here, in addition to keeping her cleared of spirits which she will continue to attract. And, of course, this will be worked on avidly by extraterrestrial spirits as well, to keep the game going.