[@Mokley]Simple really, He understands quite a bit and knows that something is causing his dreamers to turn to stone, stones don't dream. When you see a group of such strange creatures coming together it must be for a reason. Blu, I hope, will eventually learn to cooperate with the other characters instead of just following and doing so out of eyesight.

The basic plan for Blu is for him to follow and help out until somebody notices him, and convinces him to interact more with the group. Or perhaps he may be seen as a threat, as the cs implies his kind are unknown to the general public due to their rarity and wishes to stay hidden.