Episode 74

As the bats attack the village, InuYasha finds himself unable to break the barrier generated by Shiori, carried along by her demon bat grandfather. But the Bat leader braggs about having killed his own son, Shiori's father, because he threaned to abandon his duty as gardien if his brethen demon bat didn't leave the village in peace. Upon hearing that, Shiori expells her grandfather from inside the barrier in order to avenge her father. InuYasha is then able to defeat the demon bats.

As they prepare to leave the village, Myoga urges InuYasha to kill Shiori to obtain the barrier-breaking ability, but of course he refuses to murder an innocent, especially another half demon like him. So in gratitude, Shiori offers the orb which permit to erect the barrier, so that InuYasha can break it and gain the power he sook. The Tetsaiga then turns red as it absorbs the power of the orb.