User blog comment:KenpachiZaraki77/bleach spirits are forever with you/@comment-26535949-20150626225128

The Novel is supposed to be as canon as long as it doesn't contradict the original. It should be canon as in the post skip time lv of Kenpachi. But in story only tite and Norita could say that. Kubo actually designed the character and work with Norita in the novel. So it should be canon.