The angel has an olfactory sense comparable to that of a bloodhound: this can be very useful, in a great number of ways. When dealing with humans, this Attunement provides a +4 to the Tracking and Detect Lies (the angel can smell fear) skills: also, with a Perception roll the angel may determine a human's basic emotional state at that moment.

In some campaigns, celestials won't have a personal smell (no sweat glands, no secretions): even then their clothes or skin will usually pick up enough distinct smells to justify a +2 to Tracking rolls.