Not a huge Illustrator person either but I think that you would have to combine all of the elements of each person on to it's own layer inside of illustrator and then take the illustrator file in the AE. Example body, head, legs of the person on to one layer. I'd find a base layer of the person (body for example) in the layer panel then select another layer that makes up the person with the direct select tool. There should be a colored square when you select that item. Drag the colored square up to the base layer until that person is complete on its own layer. Save as an AI and bring it in to AE as a composition. That person and all of the details should be its own layer. In AI you'd have to make each person one layer. Hope that this helps.
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