In this fanfiction, some of the potential allies for Harry could be the magical creatures that have a connection to Norse mythology. For example, the Valkyries. They could help Harry in battles or in understanding his new heritage. Another ally could be Odin, Frigga's husband. Despite the initial shock of Harry's existence, he might see the value in Harry and offer his protection and guidance. And don't forget Neville. He's always been a loyal friend to Harry, and in this new scenario, he would continue to be an ally, perhaps even more important as Harry faces new and different challenges.
Well, considering the nature of the fanfiction, Harry, as the son of Frigga, would have a diverse set of potential allies. First, there are the Asgardians. Heimdall, with his all - seeing abilities, could be a great asset. He could warn Harry of approaching danger. The Norse goddesses other than Frigga, like Sif, might also be allies. They could teach Harry about Norse magic and culture. In the wizarding world, the professors at Hogwarts, especially Dumbledore, would be allies. Dumbledore, with his vast knowledge and wisdom, would be able to help Harry understand the implications of his new identity. And then there are the other students at Hogwarts. Luna Lovegood, for instance, with her open - mindedness, would be more than willing to accept Harry's new identity and support him in his journey.