The "gasa" in panels 3 and 4 are the rustling of the bush as she popped her head out and pulled it back in, respectively. The extended "gasasasa" in panel 4 is presumably the rustling of her running off through the brush.
Ko.. -chaaaan...
Come... hang... out... again...I can't even see them anymore...I'm blessed, so blessed.It makes me feel like I might get lost, so it's scary...The Aki goddesses are amazingly conscientious.The forest is getting thicker and thicker.What was that just now!?
The thing that is very lovely!?