In the Noragami universe, there's no indication that the characters themselves watch fanfiction. Fanfiction is a creation by the fans for the fans in our world, not something that exists within the fictional world of Noragami for the characters to access.
In the Noragami Visual Novel, the key characters should be Yato. He's a god with a rather unorthodox approach. Hiyori is important too. She has this unique situation where she's half - in and half - out of the spirit world at times. Yukine, as Yato's regalia, is also a main character. He has his own growth and development throughout the story, often facing challenges related to his role and his relationship with Yato.
The main characters are Yato, a god; Yukine, who is Yato's regalia; and Hiyori. Yato is an ambitious god. Yukine has his own story and development as he serves Yato. Hiyori gets involved in the world of gods and spirits after an encounter with Yato.
If the Noragami characters watched fanfiction, it would be a chaotic situation. They would encounter different versions of themselves, some might be flattered by positive portrayals while others could be offended by out - of - character interpretations. Yato, for instance, might be amused or bewildered by fanfictions that depict him in new and unexpected ways. Hiyori, on the other hand, might be shocked by fan - made stories that deviate from her own understanding of her role in the Noragami world. And the gods might be generally perturbed by the liberties taken in fanfiction with their divine natures and the world they inhabit.
Sure, the Noragami manga is completed. It was a great ride with an ending that wrapped up the plot nicely. If you haven't read it yet, it's worth giving a go.