Are There Any Popular RWBY Crossover Fanfic Tropes?

Reverse Harem: Rated 16+ After Rose's grandparents passed away, her family moves from Texas to Oregon. Quickly after arriving, she meets many characters with individual charms that attract her attention. What happens when soon after, she hears the word "mate" coming from their mouths? A guaranteed happy ending novel.

After transmigrating into a novel, I realized the heroine and I had the exact same name. Naturally, I thought I had transmigrated into the female lead. So I marched straight to the man who was still a broke nobody at the time, threw all caution to the wind, and pounced on him like I had plot armor protecting me. He even glared at me with red eyes and told me he hated me. I honestly thought he was just into the whole push-and-pull thing. Everything shattered when the real heroine showed up and I finally understood one thing. He actually hated me. Heartbroken, I packed my bags and got ready to disappear. The next second, he pinned me against the wall. "Where are you going? Already bored of me, sweetheart?"

The perpetually 17-year-old Rose Cristian has resurrected. Again. She has to. Otherwise, the evil witch Joanna would succeed in ending the world. Rose isn't worried, though, she has vanquished the enemy several times before and will do so again. Only this time, Joanna's become more powerful and it might be Rose's first loss in their 500-year-old war. That is unless Rose gains access to an ancient curse that's fatal to the witch. The catch? She has to marry the mysterious and brooding Jericho in order to activate the curse. Despite an obvious physical attraction, Rose just can't seem to like her husband and he seems to feel the same. So it's always sarcasm and fistfights whenever they're together. Add into the mix her newfound warrior team: the morose werewolf Ty and the clumsy wizard Trick. Will Rose succeed in her task this century or will she finally breathe her last?

Ruby Colton is unlike any other Omega you’ve ever seen. She’s bold, sassy, and has the smarts to keep her alive. Though she has no single strength or power because of her small wolf, she’s hard working enough to make up for her flaws with her quick wits and bright brilliance. Lucian Pierce, who is also known as the ‘Dark Devil’, has no place for troublemakers in his pack. But he contradicts this rule of his by himself when he usurps the Blue Sky pack where Ruby is from and gives the sly troublemaker a place in his pack. Ruby needs Lucian’s protection to live peacefully away from her psychotic adoptive brother who wants her gone. Lucian needs Ruby’s wisdom to keep his pack safe from an uprising of a dangerous new breed of rogues. Ruby and Lucian being together is a complex juxtaposition of contradictions. But what can they do when the universe wants them to be together and their fates are entwined? They have no choice but to be life companions in that case.

A she-wolf raised to believe she some day would be a rouge like her parents before her finds that fate has more in store.

I was just a nobody actor, killing time reading a trashy novel where the Omega side-character had my name. His only purpose? To be a disposable prop for the Alpha ML, a walking, talking disaster who gets his life ruined in 50 chapters flat. I hated him. I hated his pathetic weakness. Then I died. And I woke up as him. Now, I'm that cannon fodder. I'm in the body of the fool I despised, on the eve of his public humiliation at the hands of the novel's god-like Alpha, Huo Yan. The worst part? I never finished the book. I know how I'm supposed to die, but I have no idea how this story ends. My only guide is a faint voice in my head, a "Survival System" that gives me one simple, terrifying rule: Don't attract the protagonist. So I have a plan. Be invisible. Be boring. Stay away from Huo Yan. But I messed up. In one desperate moment to save my own skin, I did something unexpected. I showed a spark of talent the original "me" never had. And the Alpha, the man who should be looking at the female lead, is now looking at me. His scent, a predator's frost, hunts me in crowded rooms. His eyes, dark and possessive, follow my every move. He cornered me after a gala, his voice a low growl against my ear. "You are not the Omega from the script," he whispered, his touch branding my skin. "You are a liar. And I will peel back every layer until I find the truth." The plot is broken. The Alpha is obsessed. And my survival system is flashing red. I came here to avoid my death, but now I'm terrified I might just be the reason this story becomes a tragedy.