In the official series, Frieren: Beyond Journey's End , the relationship between Frieren (an elven mage) and Fern (her apprentice) is strictly .
It seems you're interested in learning about Frieren and Fern from the context of "The Lewd Dungeon," which might be a misunderstanding or misrepresentation of their characters and origins. Frieren and Fern are actually characters from a popular manga and anime series titled "Frieren: Beyond Journey's End" or more commonly known as "Sousume Frieren" in Japanese. However, given the context you've provided, let's approach this with an informative perspective focusing on their actual character depictions and roles: frieren and fern in the lewd dungeon free