Arifureta: From Commonplace to World's Strongest (Manga) Vol. 15

Eri and Hiyama have betrayed the party, slaying Kaori in the process. Although the tide begins to turn against the foul traitors, what can be done about Kaori? Hajime tries to resurrect her with his newfound ancient magic, but...why is she refusing to return to her body? The determination of a fallen heroine brings forth a shocking new power in the aftermath of a tragedy!