User blog comment:AK151/So... Episode 9 (and some blind speculation)/@comment-11188061-20130913054928

I think you - like a lot of other people does - read Blake's character pretty wrongly. The fact that she's more mature now is correct, but everything up till now suggested that Blake was a pretty naive and innocent girl at heart. She was very likely a normal, cheerful little girl who was forced to grow up due to unexpected circumstances, but her true self has never changed since then. In a way she can be just as childish as Ruby, although being older and after some harsh experiences (though this part is assumed) she had just learned to hide it better.

Remind of her of the bad things and you'll see her attitude take a 180 degrees turn, seriously.

Out of all the four girls only Blake still fit my image of her in head perfectly. In my RWBY fanfic 'Mirror, Haunt' I've depicted her in a serious mode, whereas in another fanfic (which I've never published since it was just something to pass the time) I've mentioned that Blake was the most naive out of all four people. I still believe strongly that it's true.