He is a fast/slow 'walker'. [=he walks at a fast/slow pace]
She joined a group of 'walkers' in the neighborhood.
(..) Seven blessings to you, Grandmother. Shall we pray? We said we'd fight with you, King Crow, when the time comes and we meant it, but this isn't what we agreed to. These aren't white walkers. This isn't an army of the dead. This isn't our fight. If it weren't for him, none of us would be here. (..)2016 TvShow: Game of Thrones Title: The Broken Man Season: 6 Episode 7