Since I'm not well - versed in this work, I can't say for sure. But I assume Ninay is one of the main characters. There might be other characters like her family members, friends, or love interests who play important roles in the story.
I'm afraid I don't have in - depth knowledge about 'Ninay by Pedro Paterno'. However, given the title, Ninay is likely a central character. There could be supporting characters such as a mentor figure who guides her, or antagonists who create conflict for her. It could also have characters that represent different social classes or values in the story's setting.
As I haven't read 'Ninay by Pedro Paterno', it's difficult to name the main characters precisely. But typically, in a story, the main character, Ninay in this case, would be surrounded by people who influence her life. This could include her parents, if they are part of the story, who might have certain expectations of her. There could also be peers or colleagues if the story is set in a more modern - like context, or perhaps servants or nobles if it's in a historical setting.