A yukkuri who have been unable take it easy for a long time will ultimately culminate in them wondering what's the point in them being alive in the first place.
In most cases it's a koyukkuri who is dying from starvation or abuse, asking their parents one of the following:
"Why did mwommie give birth to Maricha?"
"Why was Reimyu born if Reimyu can't take it easy?"
"It would've been better if Macha was never born in the first place..."