[Karellen]

That won't work. You cannot apply different actors images for the same person. When your daughters image is scraped for the first time, then it is applied to all episodes.

You would need to make a distinction between the different ages, basically treating each season/year as a different actor. eg <name>Jenny 15</name>, <name>Jenny 2</name> etc

As for the thumb, not needed as long as the actor and actor file are named the same. Using the above example, the filename would be Jenny_15.jpg and Jenny_2.jpg