Roose is patient with a cold cunning, possessing a skill for strategy and a calculating nature. His body is "soft hairless".[3] He is of average size and is "not handsome but not quite plain", with his only noticeable feature being his eerie eyes, which are as pale and strange as two white moons, to Jaime they are paler than stone, darker than milk. [4][5] His skin is pasty white, most likely due to the leechings.[2] See also this collection of images. His voice is spider soft.
A collared and chained Theon Greyjoy in his persona of Reek contemplated Roose Bolton:
"His face was clean shaved, smooth skinned, ordinary, not handsome but not quite plain . Though Roose had been in battles, he bore no scars. Though well past forty, he was as yet unwrinkled, with scarce a line to tell of the passage of time. His lips were so thin that when he pressed them together they seem to vanish altogether.
There was an agelessness to about him, a stillness; on Roose Bolton’s face, rage and joy looked much the same. All he and Ramsay had in common were their eyes. His eyes are ice. Reek wondered if he ever cried. If so, do the tears feel cold upon his cheeks?
Once, a boy called Theon Greyjoy had enjoyed tweaking Bolton as they sat at council with Robb Stark, mocking his soft voice and making japes about leeches. He must have been mad. This is no man to jape with. You had only to look at Bolton to know that he had more cruelty in his pinky toe than all the Freys combined.