What wpuld hate sex between Jaune and Cinder be like and who would initiate it?
I wasn't sure if you were asking for a written prompt or my headcanons, so I went with the headcanons since they were easier and quicker. If you want some type of story written, just send another ask.
It's the very definition of "Hate fucking". If anyone that would ask what that was, a video of Cinder and Jaune would be the best example.
Though if anyone did see or hear them during one of their hate sex sessions (and they are both DEFINITELY loud enough to be heard), they wouldn't know if they were trying to fuck or just plain hurt/kill each other. Honestly, it's most likely both.
Jaune grabs handfuls of her jet black hair and pulls it like it's his own personal handle while pounding her pussy or ass. He also isn't too shy about choking her a little when the opportunity arises. Cinder in turn will seriously scratch Jaune up with her well kept nails, leaving deep, almost cut like marks. Those are usually on his back, but his chest and arms are fair game too while she's slamming her hips down on him and trying to break his pelvis. Both will willingly bite down each other. Not enough to break skin (usually), but enough to definitely leave marks and cause some pain. If things get really heated, both of them are willing to smack/spank the other.
By the time they're done, they do both look satisfied and.... happy I guess? However, they also look totally spent and like they just went through hell. They both have bite marks on them, some bruises, and messed up hair or clothes (if their clothes even survived at all.)
As for who usually initiates it, surprisingly that's Jaune I think. He's usually the one who will snap first and just starts getting rougher with Cinder. To be fair though, it's usually only after Cinder has gotten under his skin enough and annoyed, teased, or tormented him over the edge. Cinder has also started some hate sex before, but usually it's Jaune because she keeps her cool a lot better.
Hope this was good because honestly this started sounding pretty hot to me~.