"My God, you're a Valkyrie... You know, I used to want to be a Valkyrie when I was younger, until I found out you were all women. There's nothing wrong with women, of course, I like women. Sometimes a little too much. Not in a creepy way, just more like a respectful appreciation. I think it's great, an elite force of women warriors. It's about time."
Odin sent his Valkyries to Hel in order to prevent Hela From escaping. The attack turned into a massacre, as Hela killed every Valkyrie with the exception of their leader. The trauma of the massacre led Valkyrie to forsaken Asgard.
In the comics, the Valkyries, or Valkyrior, led by Valkyrie, were killed in a war between Odin and Hela over rulership of Valhalla. Odin restored the Valkyries to life after he regained possession of Valhalla, but these Valkyries only have physical forms within Valhalla; outside it, they exist only in astral form.