Sometimes, there could be a best friend character in the fanfic. This friend might support anna nishikinomiya, be there for her during tough times, and also provide some comic relief or a different perspective on things. For instance, if anna is too focused on one goal, the friend could remind her to take a break and enjoy life a bit.
In some anna nishikinomiya fanfics, there could be a mentor - like an older person who has more experience in the field that anna is interested in. This mentor could offer valuable advice, help her avoid common mistakes, and inspire her to reach for greater heights.
Well, of course, anna nishikinomiya herself is a main character. She is often the center of the story, driving the plot forward with her actions and decisions.