WMG / Legacy of the Dragonborn

Auryen is a worshipper of Hermaeus Mora

First of all, the fact that Hermaeus Mora has an entire section of the Daedric Hall dedicated to him ^note Yes, it does make sense because of Dragonborn's focus on Hermaeus Mora, but this is speaking In-Universe after all., and the painting in the museum office, the Keeper of Secrets. It would make sense that someone dedicated to collecting historical/mystical artifacts would seek more knowledge through Hermaeus, or someone dedicated to Hermaeus would seek to collect historical/mystical artifacts.