Dojo Darelir, the School of Xenograg the Sorcerer

Puca

That morning as they rode past a town, a grey-striped cat made his way through the stream of people coming to market. There were animals enough on that road in that hour: horses and mules of course, and donkeys, and dogs, and pigs and cattle and sheep being driven to market, and here and there a quick-witted cat. But this one came direct to King Malcolm’s riding, lofted weightlessly to Edith’s saddlebow, and yawned in her face.

The puca seemed quite as much at ease in this world as in the other. What he was doing here, she did not know, but from the way he curled on the pommel of her saddle, he was not about to leave.

Some of Alain’s Bretons slid eyes at him. So did a few of Malcolm’s Gaels. They knew what they were looking at.

The puca met their glances. They looked away in haste. It was never wise to question the whims of the Old Things.

Edith took comfort in this one’s presence. There were folk of air enough, some of whom had followed her from the abbey, but a puca was a stronger power by far. A power for mischief, yes—but also a faithful ally who had sworn to her his service.

King’s Blood, Chapter 24

Emphasis mine.