In Naruto fanfic, 'Rena' could be an original character created by the fanfic writer. She might be a ninja from a hidden village, perhaps with unique abilities like some special jutsu or kekkei genkai. Without more context from the specific fanfic, it's hard to say exactly who she is.
Honestly, not sure who Rena is in the Quintessential Manga. It could depend on various factors like her powers, her relationships with other characters, or her role in driving the story forward.
The way other characters in the story refer to her can be a big clue. If they use female pronouns when talking about her, or if they treat her in a way that is typical for how one would treat a girl in that story's world. For example, if they compliment her on her beauty or if they include her in female - only activities in the story. Another aspect could be her emotional responses, if they are more in line with what is considered feminine in the context of the story, like being more sensitive or empathetic.
I don't know the details of the rena sarigianopoulos ghost story, so I can't say for sure if it's scary. But most ghost stories are designed to be spooky, with elements like strange noises, cold spots, and mysterious figures.
Aizawa is still going strong in the manga. There's no event or storyline that has resulted in his death. The creators have chosen to keep him as an active character.
The students of Class 1 - A are often involved. For instance, Midoriya might be portrayed as being unjustly treated by Aizawa, and the fanfic could focus on Midoriya's struggle against Aizawa's supposed unfairness. Bakugo could also be in the story, maybe being in conflict with Aizawa's disciplinary actions.
Queen Reina was a completed novel. It was a romance manga by Kim Youngji/Nana Seol Dong-Won1. This novel told the story of the female protagonist, Reina. Other than that, there were also some recommendations for other female protagonist novels that had been completed, such as "The Story of the Female Lead Becoming King in the Apocalypse" and "The Story of the Apocalypse: I Became the Female Lead in the Front of a Little White Flower." These novels all had the storyline of the female protagonist in a specific setting.
As I don't know the 'rena and waylon novel', it's hard to determine the main themes. However, if it's a coming - of - age story, themes like growing up, facing challenges, and finding one's identity would be likely. Or if it's a romance, then love, passion, and loyalty might be the main themes.