How old are you guys? If she's 21 or under (basically an adolescent) then she's allowed to be gullible and whimisical regardless of type -- or at least more gullible and whimsical now then at 35.
Your tone implies you think you're smarter than your friend and by that observation all ENFPs are dumb. I'm not really sure where people are getting this idea that ENFPs suffer from a Peter Pan complex that stunts the growth of our intellects so we're basically retarded wo/man-children who are fascinated by unicorns and fireworks? (And that's a rhetorical question, NoCap!)