See, Atlas still didn't completely understand why Divine Sanctuary had taken interest in him.
From what Adella told him, even they weren't entirely sure about the "why."
The head of the Azure Dragon Clan was Alaric Tatsuya, but he did not stand there alone. Accompanying him by his side was his wife, Artemia's mother, and the reason for Atlas' summoning.
As such, despite Alaric being their main goal, Adella took Atlas to see Mireiya Tatsuya, the person Atlas was most curious about.
He found himself in a room mostly colored red. Half of it was separated from the other half by a semi-translucent fabric, allowing Atlas to only see the shadow of the person on the other side.
Adella and Artemia were not present. While Artemia was forced to leave because of her duties, Adella was waiting outside of the door. This was a space that "only he was allowed to enter" at the current time.