Aversion to One's Own Kind Frieren rescues Sein, a local priest, from a swamp, and Sein returns the favor by curing Stark after he is bit by a poisonous snake. Sein's brother reveals that Sein has a natural talent for healing spells, and asks Frieren to push Sein into becoming an adventurer, a dream that he had held as a child but eventually lost his passion for, culminating in him turning down an invitation from his best friend ten years ago. Frieren gains an interest in Sein because his apathy reminds her of the apathy she felt before Himmel recruited her. Wanting to save Sein from his own apathy, Frieren takes it upon herself to convince Sein to become an adventurer. Sein finally admits that the reason he did not leave the village was because he knew his brother turned down an opportunity to move to the Holy City so as not to separate Sein from his hometown. However, Sein's brother slaps him and points out that he never regretted his decisions but Sein clearly does. This finally convinces Sein to join Frieren's party until he can find the whereabouts of his friend.