When it comes to Christ figures in movies, a British nanny with a talking umbrella in a musical for Children is not, perhaps, where one would first look. And yet, I think a strong case can be made that Mary Poppins is, in fact, a Christ figure. She’s not a complete representation of Christ, of course, but then most Christ figures aren’t. (Aslan in The Lion, The Witch, and the Wardrobe is the only one I can think of who is. And he’s not so much a Christ figure as, well, Christ, just in a different universe.)
If you look at the basic structure of the movie, the Banks’ home is in chaos. They do not value things in the right order, with the things of highest important at the top, and so the relations between all the people are in disarray and they do not get along. In this dysfunction Mary Poppins enters, literally descending from the heavens. She does all things rightly (she is practically perfect in every way), and calls all of the people around to live their life well. That is, she calls sinners to repentance. She demonstrates, with wonders, that she is no mere sage, but someone having authority beyond that of human authority. After restoring a right ordering to the things that the people value, which reconciles them to each other, she then departs, because if she were to stay they could not do the work they’re supposed to do. She departs by ascending back to the heavens from which she came.
As I said, she’s obviously not a complete Christ figure. For one thing, she doesn’t heal anyone. The blind don’t see, the lame don’t walk, and the deaf don’t hear. Also, she atones for no one’s sins. That’s kind of a big one.
None the less, this is an interesting lens through which to view the film, and I think it can help one to get true things out of it.