Siffrin

Siffrin he's the fox Isla meets soon after her family is hurt by one of the Narral and a big team of the Taken. Siffrin tells Isla he used to be one of the Taken himself but the Elder Jana freed him from the Mage's power and he then started assisting Jana whenever she needed a messenger to help her. Siffrin teaches Isla the simplest Foxcraft, and he helps her leave her den close to many streets. Siffrin also finds  Isla in the wild while he's in disguise as  a chief coyote which irritates the real chief. But then Siffrin helps Isla and some other foxes talk with the Elders at Elder Rock. In the third book Siffrin is one of the Foxes who help Isla fight the Mage the Narral and the some of Taken in the Mage's dark hideout.