The Devil in Miss Morgendorffer
Daria fanfic by Brother Grimace. Daria pulls a joke that goes too far and as a punishment, she and other Lawndale High students have to work at a drive-in theater. The theater owner's daughter and a squirrel are also involved in the action.
Do not ask about the llamas.
Daria was given the derogatory title of "Squirrel-Killer" in this fic, after the practical joke she pulled seemingly resulted in the death of a pet squirrel. In the final scene, we find that the squirrel was in fact alive, and it was reunited with its joyful owner. In a surprising oversight, there were no scenes where Jake commented on this title or on the squirrel's fate.