For those unfamiliar with game of thrones but want to know more about this fantasy setting: Dabi is a white walker: in the canon, reanimated corpses that are kept away from the rest of the nations in a snowy region.
Hawks, a Night’s Watch, is part of a group (see the name) that is in charge of making sure they don’t manage to breach the rest of the nations. For those who are familiar with Game of Thrones: he’s the Jon Snow equivalent
