"Every Death Manifest has a Guide to help them. Guess I'm stuck with you then."
Nat's gone through a LOT of changes over the years, but his latest redesign is definitely the best. He is the Deuteragonist of Manifest Reaper, one of the Grim Reaper's best Guides personally assigned to Seraph to aid in his training as a new Death Manifest. Nat is a vampire, and he smokes specially made cigarettes to sate his bloodlust (good thing he's undead so he doesn't need to worry about lung cancer).