Arc 17The Shadow Warriors' Hunt
As Frieren and her companions prepared to guard Serie, Ubel and Lanto were drawn into a conflict with the Empire's Magical Special Forces while the Shadow Warriors assembled to assassinate Serie. The Shadow Warriors traced Frieren's group through her tracked coins, and the arc ended with Red Hair poisoned and Sein treating him at Frieren's hideout.
- Lowell showed the group how Radaal and the Shadow Warriors had spent decades living as a family in a village, and Radaal stayed behind after the adventurers departed.
- Ubel joined Lanto on a mission to retrieve confidential documents, but Noi and the Magical Special Forces captured them before they escaped from the tower.
- Sense and Falsh revealed that Frieren's party had been summoned to protect Serie at a palace ball where an assassination attempt was possible.
- Levi and Schritt passed a mission to the Shadow Warriors, who gathered to plan Serie's assassination and discussed the guards and their past encounters with Frieren.
- Frieren tracked the silver coins she had given Gazella and suspected that he and Varos were connected to the Shadow Warriors.
- Lore detected Tracking Magic on Gazella's returned coins, and Frieren realized the Shadow Warriors had traced her group.
- Wolf shot Red Hair as Frieren, Fern, and their companions fled through the Imperial Capital, and Red Hair collapsed from poison.
- Frieren used her mana to lead Sein to their hideout, where he began treating Red Hair while Fern acknowledged that she was too unsettled to act safely.