Aunt Hjordis Ostberg is a bad ass Valkyrie She was sent to the the Fourth Union after her training to be a commander of a platoon which is where she met Arvak. Since then she’s traveled with him. However her preferred partner in crime is Sleipnir. Later on, she joined the family as to help raise Axel giving him the right foods and making sure he has clothes and all those other mundane things. Kind of a step down from being a Valkyrie but she also gets to pilot the king of the Aesir’s golem during fights and that’s pretty great in her book.