Elf
An elf (plural: elves) is a type of supernatural being in Germanic mythology and folklore. Reconstructing the early concept of an elf depends almost entirely on texts in Old English or relating to Norse mythology. Later evidence for elves appears in diverse sources such as medical texts, prayers, ballads, and folktales.
Recent scholars have emphasised, in the words of Ármann Jakobsson, that
However, some generalisations are possible. In medieval Germanic-speaking cultures, elves seem generally to have been thought of as a group of beings with magical powers and supernatural beauty, ambivalent towards everyday people and capable of either helping or hindering them. However, the precise character of beliefs in elves across the Germanic-speaking world has varied considerably across time, space, and different cultures. In Old Norse mythological texts, elves seem at least at times to be counted among the pagan gods; in medieval German texts they seem more consistently monstrous and harmful.