Hel

Rune: REI
the Goddess of the Underworld. She is sent those who were not chosen by either Odin or Freya

She separates those who are dishonorable and those that died from old age or illness. She is half white and half black. Her upper body is youthful, while her lower looks as decayed as a corpse.

goddess of the dead,the underworld

dwelt beneath one of the three roots of the sacred ash tree Yggdrasil

daughter of Loki, the spirit of mischief or evil, and the giantess Angerbotha (Angerboda)
sister of Fenrir (Fenris-wolf) and Jormungand (Midgard serpent)

realm was Niflheim and her hall, Elvidnir [misery].

She keeps company with a multi-headed dog named Garm who guards the entrance to the Underworld. (His number of heads varies between writers. I have seen 2 heads, 3 heads, or just 4 eyes)

Harsh but not unfriendly.
Leads 'the Wild Hunt' (In Norway, 'Asgardsreien'). Some say she represents the dark side of Freya.

Various Sources: http://www.einherjarve.org.uk/s_gods.htm

Norse/Teutonic Gods and Goddess
God and Goddess Index