When Noah came around the place, the guest had already felt him. However, she was shrouded in a cloak to hide her existence from others before Noah comes home. She had no idea how much guarding the Army of Sloth was doing, and it wouldn't hurt to be really careful. For someone who would even walk into the residence of those watched over by angels, she had her ways to ensure not being detected.
However, when Noah was standing in front of the door, she finally erased her cloak. Her familiar aura had been well-received, and so Noah greeted her with a smile even if he was so formal with her before. She then set her teacup on the center table before moving her head as an invitation for him to sit with her.
Noah obliged and felt slightly embarrassed as he thought that hellhounds were sensitive to smell. "Lady Dione, it's been a while since we have last seen each other." He then remembered how angry she was with what happened to Pollo. "Lady Dione..."