Chosen One
Not in the gameThere is no role called the Chosen One on werewolv.es. The name comes up anyway, so this page exists to answer the question rather than leave you guessing.
The Chosen One is one of the older village legends. Someone heard it from someone. It has never appeared in a setup, a replay, or the host's role list.
If you want to dig further
The Unofficial How To Play Werewolves wiki is community-run and not maintained by us. It is the right place to record what the Chosen One may once have done, and it may well be wrong or out of date.
This page describes the guide as it stands. If the Chosen One returns to the game, the guide will simply start covering it, with no announcement.