Gyaha use in a comic when the character is laughing. Usually written "Gyahahahahahaha.." (infintity of "ha" words)
I want to share to you a comic stripes in here, maybe you found different character in every comic strip, yep, they are all unique, so, just enjoy :D
Oh, I drew these with Adobe Flash, maybe sometimes with Microsoft Paint.
Anyway, my name is Giri (is it important?)
Enjoy