Origin
Aqueidius created Blu because he wanted to show off his abilities to the other gods, and to have a pet around to play with.
Personality:
Blu is loyal and caring, though mostly coldhearted and silent to humanity and mortal life. He doesn't care much for being aggressive, but will do what he needs if he's in danger.
Design notes:
His original design featured two different shades of blue for the left and right sides of his body, when drawing him please use only the right side. I have waay too many two-sided color characters, it's nothing against the original design, just that I use that trope too much!