A young thief might also be her ally. He is initially after a valuable item that is somehow related to her frozen touch. But as he gets to know her, he decides to side with her. He uses his skills of stealth and thievery to help her avoid capture by those who want to use her for their own gain.
A magical creature like a talking fox could be her ally. The fox might be immune to her frozen touch and understand her loneliness. It could help her navigate through dangerous forests or find hidden places where she can learn more about her power.
Another potential ally could be an old wizard. He has seen many strange powers in his long life and recognizes the good in her. He offers to teach her how to control her frozen touch so that she doesn't accidentally harm others, and in return, she helps him with his research on ancient magic.
The plot could revolve around the girl with the frozen touch being an outcast in her community. People might fear her power, and she could be on a journey to find a place where she is accepted. Maybe she meets a group of adventurers who initially are scared but then realize her good heart.
Neville could be an ally too. His skills in herbology could come in handy when it comes to finding the right plants to feed the dragons or to use for medicinal purposes. Also, Luna Lovegood might be involved. Her unique perspective and knowledge of strange magical creatures could give Hermione new ideas on how to care for the dragons. She might know of some obscure spells or methods that are beneficial.
Sakura could be one of her main allies. Even in a samurai - themed story, Sakura's medical skills and combat abilities would be useful. She could support fem Naruto in battles and help heal any wounds.
Percy Jackson himself could be an ally. Despite their differences, they both have a common goal of protecting the demigod world. His skills in combat and her intelligence would make them a great team.
Definitely Naruto first. Then there's Tsunade. As the Hokage, she could be a powerful ally. She could provide resources and political support for the female Anbu commander. Rock Lee could be an ally too. His determination and physical strength could be helpful in combat. And Neji, before his death, could have been an ally. His skills with the Byakugan would have been useful for surveillance and combat support.
Her friends from her own time could potentially be her allies even when she goes back in time. For example, if she has a special bond with Weiss, Weiss might be able to sense Ruby's presence in the past in some way and offer help. Another possible ally could be a character from the past who she befriends, like an old wizard who recognizes Ruby's special powers and decides to help her on her mission.
Thor could be an unexpected ally. His godly powers and knowledge of other realms could come in handy. He might take the girl under his wing, showing her the wonders of Asgard and teaching her about different forms of magic or combat that are unique to his world.
Thor could be a great ally. He's known for his heroic nature and strength. He might take the reborn Fem Harry under his wing, teach her about Asgardian ways, and protect her when needed. Heimdall could also be an ally. With his all - seeing abilities, he could keep an eye on her and warn her of any approaching danger. Lady Sif might be another one. As a female warrior, she could relate to Fem Harry and train her in combat skills, which would be useful in the often - dangerous Asgardian world.
Hermione could be an ally. She's smart and resourceful, and she might help Fem Harry plan her escape and even go with her. Hagrid could also be on her side. He has a big heart and is very protective. He could provide a place for her to hide at first and give her some useful magical items or creatures to help her on her journey. Another possible ally could be Luna. Luna has a unique perspective on the magical world and might be able to see things that others can't, which could be crucial for Fem Harry's escape.
Other fairies from the Winx Club could be her allies. They often support each other in the face of danger. For instance, Bloom could use her dragon fire power to complement the water powers of the Fairy of Water Stars.