Mole Cricket (モルクリケット) is a cricket who wears a construction hat. He first appears in chapter 31, "Arale's Big Change".
While digging, Mole Cricket jumps into Arale's mouth while she is sleeping, thinking it is a giant hole. While he inside her body, Mole Cricket causes Arale to malfunction, making her act like a normal little girl. After he gets out of her body, Arale becomes weird again.