The Sentinel's tail is visible when he turns to lead them through the gloom, curling out from under his cloak. Perhaps that's why he's pure grace and silence as he moves at their head. Hopefully it will help Naugus feel a little better.

"Shadowfolk, I'm not sure of," Felix says quietly, able to follow with a little more decorum now that torch lights their way. "But even scholars think the Nightingales of Nocturnal are just a legend. Thieves who've made some kind of pact to serve her cause. Of course, this would be where they'd end up. A Daedric Prince usually lays claim to the souls of their followers after death..."