maybe you could say something like.... I have always tried to do what I think Princess Diana would have done

I would use imatate rather than emulate

the question about the role model... I don't think just saying that is descriptive enough, but you could go on to say how she changed you....ie.. Princess Diana has always been my role model, I stived to have have the grace and poise she had, I dressed with class, and treated other respectfully...... or something to that

HTH

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