Definitely Dumbledore, if he were still alive. He was always a guiding figure for Harry. He could use his wisdom and influence in the wizarding world to ensure that Harry gets the justice he deserves. Also, Neville could be an ally. Neville has grown into a strong and brave character, and he would stand by Harry, offering his loyalty and friendship during this difficult time.
The Weasley family as a whole could be great allies for Harry. Mrs. Weasley would mother him and offer him the love and care he needs. Fred and George might use their humor to try and lift Harry's spirits in their own unique way. Ginny, who has a special connection with Harry, would be there for him emotionally, helping him to face his fears and start to heal.
In the fanfiction, Harry might find allies among the ghosts in Hogwarts. Since he is the son of Hades, he could have a special connection with them. They could provide him with information and support. Another potential group of allies could be the outcasts in the wizarding world. People who have been shunned or misunderstood might be drawn to Harry because they see him as a fellow outcast due to his new identity. And there's also a possibility that some of the more rebellious students at Hogwarts, who are not afraid to go against the norm, would become his allies and help him face the challenges that come with being the son of Hades.
One possible plot development could be Harry's struggle with his mental health. He might experience symptoms like depression, anxiety, or post - traumatic stress disorder. Another could be his search for justice or revenge against the perpetrator. He may also face challenges in his relationships as he tries to come to terms with what happened.
Well, Luna Lovegood could be a great ally for Harry. She has an open - minded and accepting nature. She might see something special in Harry even though he's been abandoned and would offer him her unique brand of friendship and support. Dumbledore, if he's still around in the fanfiction, would also be a key ally. He has a lot of knowledge and power and would likely take an interest in Harry's situation, guiding him and protecting him. And then there's the Weasley family. They are known for their warmth and kindness. Even if Harry is abandoned, they might take him in and be his family, with Ron being his closest friend among them.
Hermione would likely be a strong ally. She's always been Harry's friend and is smart and resourceful. In this scenario, she could help fem Harry with spells and strategies to keep her and her child safe.
Hermione would definitely be one of his allies. She is smart and would be able to help him research about his new identity and how to control his powers. For example, she could find ancient texts in the Hogwarts library that relate to both the wizarding world and the Greek gods.
His friends from Hogwarts could still be his allies. Hermione would use her intelligence to help him understand his new situation. Ron would be there for moral support. Additionally, any friends or allies that Rias has in her world could also become Harry's allies. They might be magical creatures or other powerful mages.
Hermione would definitely be an ally. She's smart and would be able to help Harry research about his 'son of Mars' heritage, finding ancient spells or texts that could explain it further.
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.
One potential ally could be Hagrid. Hagrid has always been a friend to Harry, and in this fanfiction, he could help Harry understand his newfound heritage as the son of Hephaestus. Hagrid's knowledge of magical creatures could also be useful in Harry's adventures related to his Hephaestus - given abilities.
One consequence could be that Bill feels a strong sense of protectiveness towards Harry. He might immediately try to comfort Harry and ensure his safety. For example, he could offer to let Harry stay with him where he can keep an eye on him.