>>281358756 (OP)
What other face is there to make when you've been rejected twice, in 2 vastly different ways, by the same person?
>Fern rejects apprenticeship to hang out with her best pupil ever's flunkie student, Frieren
>Fern wants some useless utilitarian spell over BIG BANG BOOM magic
Serie was essentially told to fuck off because her services are no longer required, and by a new world prodigy that accomplished a feat (seeing Serie's mana fluctuate) that literally no-one else has been shown to do.
To make matters worse, Serie ate her words she said to Sense before even seeing the remaining applicants, having passed a significant portion of the selection.
Serie has a very sad story: the story of always being wrong. And this story is written by Frieren.