The bat its eyes opened themselves in shock before it quickly shook its little head at the remark of the word 'sister'. Then it took rest by its master and allowed a soft yawn to leave its mouth. "I know, we need our sleep, might as well take it, no?" And with that said, the both of them fell into their deeply desired slumber, only to wake up at the lowering of the sun, when time would call for the night again to emerge.