I just found out that Robert Kirkman hinted that we might see Penny Blake in the beggining of the episode, Say the Word. If you read the comics, you saw her as an undead child and locked in shackles. She was also the governor's neice in the comics.
Im just guessing in the TV series, penny is his daughter and he keeps her as a walker in the same room as the walker heads. What do you guys hink will happen?