Not explicitly Norse but the Celtic chooser of the slain? Sounds like a Valkyrie to me.The Morrigan - Shape-shifting Celtic goddess of War, Fate and Death. Story in "The GODDESSES / Psychology of Female Power"
Hel by deathknightxx on DeviantArt. Loki's daughter, Hel, rules the underworld in Norse Mythology. She's half corpse, half woman. I personally have always found her interesting because she's not your typical goddess