Thanks! I love fantasy and dragon stuff. I've always wanted to be a knight in shining armor, even though I'm a girl.
hehe
Each Imaginary Friend has his or her own special ability; Kargo's is that he can change size. He can become bigger or smaller, given the situation.
In one of my fan fictions about my Foster's Human character, she is being bullied at school. Kargo suddenly appears as a giant fire-breathing dragonoid beast, and then when all is over, he shrinks down and they become best friends from then-on.
(I am way too obsessed with this show.)