One common theme is the exploration of different magic systems. Since Jaina is from Warcraft with its arcane magic and Elsa has her ice magic from Frozen, fan fictions often delve into how these two types of magic interact.
A great 'Jaina Elsa' fan fic is 'When Ice Meets Arcane'. It's set in a world where the universes of 'Frozen' and Warcraft collide. Jaina and Elsa initially have some misunderstandings due to their different approaches to magic. But as the story progresses, they realize they can complement each other and together fight against an ancient evil that is trying to take over their merged world.
Another possible main character could be a futa named Nova. Nova is an inventor in her world and has created many amazing gadgets. When Elsa visits Nova's world by accident, Nova shows Elsa all her inventions. Their shared sense of wonder and Nova's intelligence make Elsa fall for her, leading to the idea of marriage in the fan fiction.
One great 'Elsa fan fiction' is 'A Frozen Heart's Redemption'. It explores Elsa's journey of self - discovery outside of Arendelle. She meets new characters and has to learn to control her powers in different and more challenging situations than in the original story.
One possible plot could be that Elsa discovers a new world where 'futa' exist and through a series of adventures, she falls in love with one and they decide to marry. Maybe they first meet when Elsa is lost in an enchanted forest and the futa character helps her find her way.
Jaina Antonio was a character in the movie 'The Hunt 2', played by Claudia Gerini. She was the leader of the Camorra organization and the owner of the high-table seat. She was also the leader of the gang. In the movie, John Wick was asked to kill Jaina Antonio so that he could inherit her throne.
Probably Anakin Skywalker. Given his importance in the Clone Wars, it's likely he would cross paths with Jaina. They might have some intense lightsaber duels or deep conversations about the nature of the Force.
Jaina Antonio was a character in the movie Fast Track, played by Claudia Giellini. She was the leader of the Camorra organization and the owner of the High Table. She was also the sister of the main character, John Wick. In the movie, John was forced to kill Jaina to maintain his position in the Camorra organization. Jaina's death triggered a series of events and conflicts.