Look, this is the superior trope in my opinion. Enemies that become very close and eventually one of the only people that understand each other while also having some animosity between them? And no/barely any romance? Excellent. I don't think there are enough books out there with this dynamic, and most of the results I found were just romance novels, so I, a chaotic aro/ace, took matters into my own hands. If you're looking for even a crumb of enemies/rivals-to-friends, this is the place for you.