Devero's in Master's study, browsing tidying the bookcases-- his go-to when there's nothing for him to actually do but he needs to stay available. He alerts immediately to the sound of Master's return to the suite, but it's not until he hears the timbre of Samir's voice that he shelves the volume in his hands.

He presents himself almost immediately, and stops short when he actually catches sight of the other man. "Sir...?"