Which wildling skinchanger narrates the prologue of A Dance with Dragons?

Varamyr Sixskins is the wildling skinchanger who narrates the prologue of A Dance with Dragons. The chapter begins through the perspective of a wolf before revealing that the controlling human is Varamyr, badly wounded after the wildling defeat at the Wall.

Varamyr is dying in the haunted forest with his companion Thistle. As his body fails, he considers taking over hers, an act skinchangers call an abomination. His memories explain how he first entered animals, was trained by the skinchanger Haggon, and eventually controlled six creatures, giving him his name.

The prologue explores the rules and dangers of skinchanging. Varamyr remembers that entering an animal can become addictive, while attempting to seize a human body violates the moral boundaries taught by Haggon. After Thistle resists him, Varamyr’s consciousness survives by entering one of his wolves.

Rattleshirt and Tormund are prominent wildling figures but do not narrate this opening chapter. Orell is another skinchanger associated with the series, yet his consciousness is tied to an eagle and he is not the prologue narrator.