Another option is that the father could be an unknown Asgardian. Loki might have had a brief encounter with this person, and now she has to face the consequences alone. Or perhaps the father is someone from another realm entirely, like a powerful wizard from a far - off land who Loki met during one of her adventures.
It could be Thor in a really unexpected plot twist. Maybe there was some magic involved that led to this situation. This would create a huge rift in their relationship at first, but also force them to re - evaluate their feelings for each other.
Perhaps the daughter she is pregnant with has some special powers even before birth. This could lead to Loki having strange dreams or premonitions about the future of her child. And it might attract the attention of some dark forces who want to use the unborn child's power for their own gain.
Perhaps an unknown entity from a different realm. Loki might have had an encounter during one of his travels to other worlds, and this being's powers or nature caused the pregnancy. It could be a powerful magical being that Loki underestimated, and now he has to deal with the consequences.
In some fanfictions, it could be Gray. Their rivalry - turned - friendship has a lot of potential for such an unexpected plot twist where Gray is the father.
There's also a chance that it's Archie. In some fanfiction scenarios, the relationships can be twisted, and Archie could be the one who got Betty pregnant. This would surely create a lot of drama and conflict among the characters, as it goes against their typical dynamics in the original story.
There's a chance it could be a new character introduced in the fanfiction. Maybe someone who has a mysterious past and enters Annabeth's life briefly but leaves a big impact, resulting in her pregnancy.
It could be a new character created specifically for the fanfiction. Maybe a charming rogue who crossed her path during one of her adventures.
In some fanfiction scenarios, the father could be a character who was under a spell or some sort of mind - control when the encounter with Kiba happened. This would add an interesting twist to the story as Kiba has to deal with not only the pregnancy but also the mystery behind the father's identity and the circumstances of their encounter.
Perhaps the father is a new character introduced in the fanfiction. A rebel from a far - off place who came to her district and they fell in love at first sight. He could be on a mission related to overthrowing the remaining oppressive forces in the post - Hunger Games world and their love and her pregnancy add a new dimension to his mission.
One possible plot could be that Fem Harry Potter discovers her true parentage as she grows up in the wizarding world. This revelation could cause chaos as she tries to understand her place between the two very different worlds. She might have to learn about her Norse powers in addition to her magic, and face challenges from both sides.
Thor could be one of the first to take care of Loki. Despite their differences, Thor still cares about his brother. He would use his strength to protect Loki from any threats while Loki is sick and might even search for rare remedies.