Complex sentence: Under this usage, the person in question is labeled as an embodiment or archetype, whose very identity may be considered synonymous with the associated ideal; or otherwise representative of its most favorable or least favorable aspects.
Split into simpler sentences: Under this usage, the person in question is labeled as an embodiment or archetype. This signifies that the very identity of the subject is synonymous with the associated ideal; or otherwise representative of its most favorable or least favorable aspects.