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.
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.
Chapter 11 is the strongest chapter-level answer because it starts from After a meeting, Shang Shaojing pinched the bridge of his nose, tired, and... and follows through on Miss Qin, please accompany us to the police station to explain this....
Chapter 714, "I'm Using Voice Input", is the clearest early answer because it turns Shen Lan's situation into a concrete plot event. The chapter turns that into something concrete by moving from Jiang Li looked at Jiang Mingyu, who appeared deeply hurt, and...
Chapter 739, "Not Paying Debts, Shameless!", is the clearest early answer because it turns Jiang Li's situation into a concrete plot event. The chapter turns that into something concrete by moving from Shu Yan isn't that ill, it's just a common cold, no, no need to go to...
Chapter 443, "Did Jiang Li Steal Team F's Home?", is the clearest early answer because it turns Team's situation into a concrete plot event. It opens with Team D's captain, curious, turned around and was surprised to find...
Chapter 860, "Is your friend feeling unwell?", is the clearest early answer because it turns Fairy Sister's situation into a concrete plot event.
Chapter 544, "I Shouldn't Have Stopped You from Pursuing Shang Shaojing Back Then", is the clearest early answer because it turns Su Yinwan's situation into a concrete plot event. Early on, [Hahaha, I'm laughing my head off, how come I never knew Miss Zhuola....
Chapter 626, "Emergency PR!", is the clearest early answer because it turns Jiang Cheng's situation into a concrete plot event. A useful checkpoint is the way the scene starts with The drone hovering in mid-air had precisely captured this scene, and...
Chapter 463, "Even if it's a Wild Boar, I'm Willing!", is the clearest early answer because it turns Dragon Ridge Island's situation into a concrete plot event. Early on, The evening glow gradually bathed Dragon Ridge Island in a dazzling.... By the end, [What??] [Looking for a wild boar??.
Chapter 631, "It's Him Who Got Hurt, Then It's Fine", is the clearest early answer because it turns Hurt's situation into a concrete plot event.
Chapter 463, "Even if it's a Wild Boar, I'm Willing!", is the clearest early answer because it turns Willing's situation into a concrete plot event.