Well, it depends on how it's written. If it adheres to the general guidelines of positive, respectful and non - offensive storytelling, it can be okay. But if it goes into inappropriate or disrespectful territory, then it's not appropriate.
It could be appropriate as long as it focuses on creating an interesting story with good character development. However, if it contains any form of exploitation or goes against the essence of the RWBY series' values, it's not suitable. For example, if it objectifies the characters in a negative way, it's a no - go.
I think it can be appropriate in the sense that fanfics are a form of creative expression. But it has to be done right. It should respect the source material and the characters. If it just uses the concept in a lewd or inappropriate way, that's not acceptable. Fanfics should aim to add to the lore or explore different aspects of the characters in a proper manner.
Chapter 478, "Someone Comes to Bully Me?", is the clearest early answer because it turns Jiang Yan's situation into a concrete plot event. Early on, However, before Jiang Yan's axe could descend, he heard a rustling....
Chapter 560, "These People Have Definitely Been Cursed!", is the clearest early answer because it turns Jiang Li's situation into a concrete plot event. A useful checkpoint is the way the scene starts with But the other party had already walked far away, and it didn't seem...
Chapter 737, "Shu Yan in Trouble!", is the clearest early answer because it turns Shang Shuyue's situation into a concrete plot event. The chapter turns that into something concrete by moving from South City Film and Television Shooting Base.
Chapter 757, "Don't come begging us then!", is the clearest early answer because it turns Cheng's situation into a concrete plot event. The setup is Old Man Cheng's guess was spot-on., but the pressure keeps building through After the friends of Jiang Li and a few others arrived, there had....
Chapter 609, "What identity would make the Crown Prince barbecue!", is the clearest early answer because the hidden truth stops feeling like mere subtext. The chapter gives readers a real answer by opening on Jiang Yan: "!!!" Right, the Cat and Mouse Game was over, they had...
Chapter 338, "The Adulterer is Far on the Horizon, Yet Close Before the Eyes", is the clearest early answer because it turns Horizon's situation into a concrete plot event. The chapter gives readers a real answer by opening on Tang Jinyu, dressed in a light apricot Cheongsam, sat indifferently...
Chapter 481, "She Actively Pursued the Boss", is the clearest early answer because it turns Bai Lu's situation into a concrete plot event. The chapter turns that into something concrete by moving from Bai Lu ultimately couldn't exchange for 500 points.
Chapter 377, "Master Above, Please Accept Your Disciple's Bow", is the clearest early answer because a shaky connection becomes usable in the plot. The chapter gives readers a real answer by opening on Tell me what it is that you came to ask of me this time?" After...
Chapter 568, "Not at All", is the clearest early answer because it turns All Shang Shaojing's situation into a concrete plot event. The chapter gives readers a real answer by opening on Shang Shaojing was silent for several seconds before he laughed as...
Chapter 501, "This Night, Destined to be Turbulent", is the clearest early answer because it turns Dragon Ridge Island's situation into a concrete plot event. A useful checkpoint is the way the scene starts with After settling in, Jiang Mingyu aimlessly strolled the streets.