I like to look at Andrea's role as, like, everyone else at Woodbury. That's how they see The Governor. They're using a character we know to show that. A lot of the people there have no clue what's actually going on there. Andrea is one of the people. I guess she knows more than the others, but she's not seeing The Governor force Maggie to take her shirt off. Or killing innocent soldiers. Once she finds out about that stuff, though, I have no doubt she'll do the right thing.