Speaking as someone familiar with both the lucid dreaming community and the history of dream exploration, I'd start with an important distinction: there is no universally accepted taxonomy of dream beings. The names people use—"dream people," "administrators," "guides," "entities," "astral beings," "thoughtforms," and so on—are interpretations, not objective categories.
What you've already noticed is actually one of the oldest observations in lucid dreaming: not all dream characters behave the same way.
The easiest category is what you call "dream people." Many lucid dreamers call them NPCs, background characters, extras, or generic dream figures. They often seem to exist only to fill the environment. They may have little memory, little autonomy, and can often be altered, erased, frozen, or transformed through dream control. They tend to react mechanically when questioned.
The second category resembles what many experienced lucid dreamers call autonomous dream characters. These are not necessarily "administrators," but they feel different. They have stable personalities, surprising responses, emotional depth, and sometimes seem aware of the dreamer's intentions before the dreamer speaks. They often resist manipulation. Some lucid dreamers report that attempts to erase them fail, produce unexpected consequences, or simply don't work. Your term "administrator" is actually quite close to what many people independently invent. Various dream communities have called these figures "controllers", "overseers", "gatekeepers", etc..
