Okay so spoilers for the Thorn lorebook — So we know Shin is actually a founder of the Shadows of Yor— and in the cutscene we see the shadow pull out a Thorn and says “You were always so afraid Shin would get you” — now I think Shin Malphur, who is a solar hunter (like our shadow who wear shards of galanor) is this shadow who’s about to shoot drifter. I think this because as he says Shin, he shifts his Thorn in his hand, as like a sarcastic callback to the man with the golden gun red herring — because clearly now we all know Shin like all the Shadows Of Yor use dark and light, so he probably would have a Thorn. Anyway, that’s my theory. Could also be Uldren like everyone is saying because he is wearing the Prodigal mask which has a reference to Crow, but I feel like that’s impossible because Uldren was never a Shadow of Yor nor did he know the backstory of Drifter and shin (and Drifter calls this clusters man “old friend” too).