Realizing the danger he still poses due to the Nokker in his arm and his lineage, Kahaku makes the difficult choice to leave Fushi and the Guardians behind, seeking his own path.
Fushi moves beyond just his friends, choosing to revive nearly every casualty of the Renril conflict. This creates an "immortal army" that effectively overwhelms the Nokkers and forces their retreat. Fumetsu no Anata e 2nd Season Episode 19
Amidst the celebration, the episode grounds the emotion through Eko , who continues to struggle with the Nokker infestation in her arm. Thematic Impact Realizing the danger he still poses due to