Looking at the Thompson advert of the bear that Jackie provided me I wonder about the extent of the abuse I should indicate in the marionette. The bear in the advert does have it hard but in regards to the abuse he suffers I wouldn't call it malevolent behaviour. Careless definitely but I understand that is typical at the sort of age we saw. And things like being stuffed into the washing machine or being hung to dry be the ear happens regardless of the child's age.
The amount of abuse displayed will directly correlate with how positively or negatively the child is percieved. If the abuse is too extreme, the girl could fall right into the realms of a nightmarish unlikeable characature. If the portrayed abuse is too soft however the marionette may seem ungrateful for envisioning freedom or trying to physically get away from her.
I might go slightly beyond the Thompson angle; the marionette gets his knocks and blows, but not ot the point where it is effectively a chew-toy for a callous little terror.