I believe this early sketch of Penny from The movie The Rescuers is by Ken Anderson.
When child actress Michelle Stacy was chosen to voice the character, animators Milt Kahl and Ollie Johnston based their drawings a little after her appearance.
Michelle also posed as Penny, but I do not know if she was filmed or just photographed.
Ollie Johnston sketched these poses from that reference. You can tell that Ollie was looking for a certain melancholy within the personality. One of his key sequences to animate was the sentimental moment where Rufus the cat tries to comfort Penny in the orphanage.
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