Gloris responded when Trick had Kenzi help him in summoning a Lightning Bird when a lucky coin, the Coin of Jahayla, shared by him and Valentine was lost. Trick needed to use one of her eggs in a spell to locate the coin.
Kenzi had to communicate with Gloris as only fellow Lightning Birds can see each other, but humans (unlike Fae) can see them. Gloris already knew that Trick was after one of her eggs.
Kenzi sided with Gloris and told her what she wanted to hear, while Gloris took shiny objects from around the room, a common Lightning Bird trait. Kenzi managed to persuade Gloris that she should become Gloris' agent and thereby be the one who handles all her dealings. Kenzi offered a favour from Trick for the future in exchange for one of Gloris' eggs and Gloris accepted.
When she was about to make her leave, Gloris revealed that Trick didn't really need her egg as he could make anything happen if he just started writing in his "blood book" again, and then she disappeared.
- 1.10 The Mourning After