Explorers don’t tend to get a warm welcome here as they are considered an upmarket form of a nosey parker. So if you are an alien who likes visiting other worlds, keep it quiet. Blend in for a while, then disappear later. You’re more likely to get out alive if you do that. If someone doesn’t kill you directly, that same someone will find another magical being who will.
It is perfectly all right for fairy godmothers like Eileen to explore other worlds though. Almost anyone else would call what she does spying but the Kingdom sees it as necessary research.