v;asgard
As Thor prepares to make his journey with Loki and the Tesseract back to Asgard, Kira stands way too close to the beam of light, and is accidentally transported with them. She stays as their guest, carrying no further ill will against Loki as long as he can suffer his own company. She asks of Odin, if she may read from the library to learn of the nine realms and Midgard's role in the balance. He allows her to, with limitations.
In her time spent in the kingdom, she tells Frigga of her journey so far, and of her lineage. Though she is a creature of darkness, she is at heart heroic and works best with guidance, that she doesn't succumb to wrath. Frigga shows her the armory and lets her dress and arm herself. She is invited to become a lady of the court, a recognized prince of Midgard, and to stay indefinitely. Before she can give her answer, Thor returns to Asgard with Jane, who is unwell.
Neither Asgardian or Midgardian medicine can extract the Aether from Jane. Through infiltrating the dungeons, Malekith and his army attack Asgard in search of the host of the Aether. Kira and Frigga protect the keep side by side, but despite their efforts, Malekith escapes having done considerable damage to the palace defenses. She nurses Frigga's wounds until Odin can heal her.
Kira and Sif work together to combat the kingsguard, while Thor and Jane and Loki leave to destroy the Aether. News of Loki's death reaches the castle. Though she cannot grieve as his mother grieves, she expresses she is regretful he could not return to them. This backfires later as fake Odin attempts to have her banished to Vanaheim.