Out of all the Rainbow Friends, Blue appears to be the least intelligent of the friends, being easily fooled by the boxes even when the player below them is moving (although he will not be fooled if he sees them hiding). Judging by a sign, Blue seems to like eating. He also doesn't seem to like being woken up
While a murderous being, Blue seemingly wasn't always like this, which seems to be proven by him having been friends with someone in the past
