Little piece of trivia. The japanese title of the series is "Sousou no Frieren", which is the way demons call Frieren (Frieren the Slayer). But, as is usual the case with japanese words, the title is a double entendre. "Sousou" also means "funeral", which is probably a reference to how Frieren's life is almost a constant sequence of "funerals" in the way everyone around her grows old and dies, and all she can do is watch it happen.