User blog comment:Mr. Ob(li)vious/Is Blake's character inconsistent?/@comment-184.144.47.224-20130923051040

I believe that Blake arrived at Beacon with a mindset that she has to be all serious all the time, as demonstrated by her aloofness and bluntness in The Shinning Beacon Part I. In Part II, she continues to act in said way until she meets Yang and Ruby together, and seeing how easy they are at being themselves demonstrates that it is okay to have some filing at this school. The next time we see her, she appears before Tang in the Emerald forest, killing an Ursa right in front of her. She says nothing, but gives Yang a smirk, as if testing the waters to see how much personality she can show. When the two arrive at the temple, after selecting a chess piece, they are both satisfied with each other and how they operate, and exchange large smiles, which to me is the point where Blake's social barriers fall, and she decides to make the most if her time at Beacon.

The other theory is that Ruby has the ability to bring out the best in people. Blake is her cold, uncaring self right up until Ruby asks about her book, and Blake finally looks into her eyes for the first time. It is after Ruby and Blake have her little heart-to-heart moment that Blake's personality begins to open up. The same can be said about Wiess, as she softened up her attitude in Players and Pieces, and despite being livid at her in Players and Pieces, it is really easy for Wiess to begin to like her back.

These are just my theories though.