That has to be the craziest and most badass child I have ever seen.
XD Well, the first picture was edited slightly, hahah. She actually says "STUPID!! STUPID!! STUPID!!" But the second picture is completely unedited.
Apparently she is the main character in two mangas. And her hair is green.
But... are those mangas made by the same person who Made Azumanga Daioh? The art is strikingly similar.
*uses the awesome power of research*Yes!
Yeah, she's the main character of Yotsuba&!
and Try, Try, Try (webcomic). Her hair is awesome and looks like a four-leaf clover, hence the translation of her name. Kiyohiko Azuma is one awesome dude. XD Both Yotsubato and Azumanga Daioh are two of my favourite things to ever come from Japan.
EDIT: I did it again. I just can't stop myself.