Sugar-and-Sack

Sugar-and-Sack is a goblin.His true name is Sma-rakki.

In Runemarks/Runelight
At the end of Runemarks he manages to dispose of the head of Mimir ( otherwise known as the Whisperer, or the Nameless) ; and becomes the body of Tyr. He meets Maddy in the cellar of Mrs. Scattergood, and ends up leading her through World Below and following her to the Seven Sleepers, or Vanir. He then leads Odin to Loki.

In Runelight, he...