Numerous characters both major and minor get chapter names like that. Asha gets a chapter where she's "the sacrifice", Victarion gets a chapter where he's "the iron suitor" and chapters that just go by their name as well. Arya has been "the ugly little girl" in the chapter title. Theon has been "the ghost of winterfel".
Regardless, he's still a point of view character that isn't central to the plot.
Regardless, he's still a point of view character that isn't central to the plot.