It's either Dr. "she's my wife" Jill or Heels Up that are almost always following him around in the background. If not, some staffers are quick to shoo press away when Xiden starts to loose it.

I recognize the need for a "helper" who is trusted by the dementia patient to follow them everywhere. When my grandfather suffered with the disease, his wife of 40+ years always was by his side, because he cold remember her, but not his own sons eventually as he had "lost" that part of his memory.