How to express what the elements of the charity advert could represents

How to say what the different elements could represent:

In my opinion Katie represents /shows / illustrates / portrays / symbolises / depicts / signifies/ highlights childhood and innocence.

How to express the idea of doubt/your personal opinion:

I think Katie might be...
Perhaps Katie could be...
In my opinion Katie is...
Katie could possibly be...
One could argue that Katie is...
Katie is most likely ...