Are you talking about Nari's master or Gi-hyun? There's not really much about Nari's master except that he saved her once when she was used as a sacrifice. Probably the same sacrifice like Woo hee's but it didn't work since she was a substitute and not the actual sacrifice that's Woo hee from my understanding at least with what she said about 'him' not appearing like before but Gi-hyun appeared. Her master just so happened to pass by the village and saved her. Nari's been searching for him for a long time in order to be with him again since he taught her about exorcism. Also the village was in a stagnate time where it never changed after the bet was made with the lord (from my understanding again) and since he lost, the village time finally moved again so everyone died. I'm guessing Nari use to live in that village since the master said since the time she entered she knew what the village was like and could've left but chose not to. The story is kinda confusing at parts even for me though I feel like some parts are missing where when Woo hee cried since Gi-hyun was hurting due to her. Either that or there was just a huge skip.
I didnt understand anything of this chapter, and who was that boy with snow white hair? gosh I'm confused
but i keep coming back for more cause the art is so pretty ╮(￣▽￣)╭