The revolutionary army members are obvious allies. They share a connection through her father. Sabo, in particular, could be a strong supporter and mentor to her. Also, some of the more independent pirates like Eustass Kid might end up being her allies if they have a common enemy.
The Straw Hat Pirates could be great allies. Luffy is always open to new friends and they could help her with her goals. Another could be Trafalgar Law. His skills and his own motives might align with hers at some point.
Raoul could also be an ally. Despite his past with the Phantom, he might see the daughter as an innocent and want to help her. He could use his influence in society to shield her from the negative attention that might come her way once her identity is known.
There's also a possibility that some of the more morally grey characters in Gotham, like Catwoman, could be Bella's allies. Catwoman has her own code of ethics, and she might relate to Bella's struggle between good and evil. They could work together in certain situations, especially if there are mutual benefits involved.
The Teen Titans could be potential allies. They are known for giving second chances and helping those who want to turn their lives around. If Deathstroke's daughter shows that she wants to be different from her father, they might take her in and help her develop her powers for good.
Other dragon slayers could be her potential allies. They might recognize her skills despite her being a princess. Also, magical creatures who are enemies of the dragons, like phoenixes or griffins, could side with her. And some wise old wizards or witches who see her potential might offer their help.
Natsu could be a great ally. Since he is also a dragon slayer, he could offer advice and support to Lucy in her elemental dragon - slaying journey. Happy, Natsu's flying cat companion, could also be helpful in terms of providing transportation and some comic relief. Erza is another potential ally. Her strong combat skills and leadership could be valuable when Lucy faces tough dragon - slaying challenges.
Potential allies could be the Greybeards. They are known for guiding the Dragonborn, and if they recognize the Dragon Priest as the new Dragonborn, they might offer their wisdom and support. Enemies could be the Thalmor. They often oppose powerful individuals who could disrupt their plans, and a Dragon Priest - turned - Dragonborn would be a huge threat to them.
There's also a possibility of her allying with some of the more neutral houses. Houses that were tired of the constant fighting between the big players. Her daughter could offer them stability and protection in exchange for their loyalty. She could present herself as a new hope for a more peaceful Westeros, which might attract these houses to her side.
Luke Skywalker would be a great ally. Since he was also trained in the ways of the Jedi by Obi - Wan, he would likely feel a connection to Obi - Wan's daughter. He could offer her guidance in using the Force and share his own experiences. Another potential ally could be Chewbacca. He's loyal and strong, and his knowledge of the galaxy could be very useful for her. He could help her travel safely through different planets.
Natsu could be one of her potential allies. Since he is a dragon slayer himself, he could understand some of the challenges Lucy faces as a Dark Dragon Slayer. He might offer his fire - based powers to complement Lucy's dark dragon slaying abilities. Another could be Erza. With her strong combat skills and leadership, she would be a great asset in battles against dark dragons. Erza could also protect Lucy when she is still learning to control her new powers.
Obviously, Alfred is a key ally. He has all that knowledge about Batman's operations and can be a great support to the reborn character. Commissioner Gordon is also an important one. His connection to the police force can be very useful for the reborn Batman in fighting crime.