Folks are factoring the meaning too much. She is both an embodiment and a 'poster-child' so she is an:

exemplar - a person or thing serving as a typical example or excellent model.

or a

paragon - a person or thing regarded as a perfect example of a particular quality.

Folks are factoring the meaning too much. She is both an embodiment and a 'poster-child' so she is an:

exemplar - a person or thing serving as a typical example or excellent model.

or a

paragon - a person or thing regarded as a perfect example of a particular quality.

Oxford Dictionaries, paragon