Who could be the main characters in 'naruto neglected gremory fanfic' other than Naruto?

There could be members of the Gremory family. For example, Rias Gremory might be a key character. She could be one of those who initially neglect Naruto but later come to realize his potential. Another character could be Issei Hyodo, who might be in a position where he has to choose between the traditional Gremory way and Naruto's different approach.

One possible main character could be a servant or an ally of the Gremory family who initially follows the family's stance of neglecting Naruto. But as the story progresses, this character might see Naruto's true nature and start to side with him. Also, there could be an elder of the Gremory family who is strict about the family's reputation and is against any form of association with Naruto at the start.

A mysterious figure from the Gremory family's past could be a main character. This figure might have some connection to Naruto's situation, like perhaps they had a similar experience of being neglected in their time. There could also be a rival family's member who sees Naruto as a tool to bring down the Gremorys. They might approach Naruto, offering him a way to get back at those who neglected him, but Naruto has to decide if he wants to be part of such a scheme.