"The ring was the queen's ring-one of the magical items that the fey were allowed to take away from Europe during the great exodus.  The ring was a thing of great power..." "I slipped the silver ring off the cord, holding it in the palm of my hand.  The cold metal grew warm against my hand. I waited tensely for it to grow hot, but it was just a slight pulsing warmth."

"The ring reacts to the guards that are still able to father children.  If the ring remains quiet, then do not bother with them.  But if the ring reacts, then you may sleep with them." - Kiss of Shadows

Rings' reaction to Galen: "He brought my hand to his face and kissed it lightly.  When his hands brushed the ring, there was a shock of something like electricity, but it wasn't that.  It was magic."

Rings' reaction to Barinthus: "He brought my hand to his lips and laid a gentle kiss against my fingers.  His lips brushed the ring and sent a tingling wave through both of us.  He looked solemn again, face closing down, as he dropped my hand."

Rings' reaction to Doyle: "He stopped walking and grabbed my right hand, and the moment his skin touched the ring it flared to life, washing us both with that electric dance.  Whatever magic was in the ring, it recognized Doyle as it had recognized Barinthus and Galen."

Ring's reaction to Rhys: "He kissed my hand, and his lips brushed the ring.  It quickened-that was the only word I had for it.  It flared through me, through us both. The sensation seemed to squeeze my heart, chase it into my throat like a trapped thing." ... "It was the strongest reaction yet, and that sort of worried me."