A personal headcanon I have and that fanfic writers are also fond of seems to be that while Dr. Ratio is very book smart, Aventurine is street smart to a high degree. Enough that it often baffles Dr. Ratio.

We saw the Nightingale vs Eagle argument and how Aventurine was able to identify the shrinking gate while Veritas didn't even consider it.

So I love scenarios and fanfics where Aventurine makes what everyone assumes are lucky guesses and gambles but Ratio slowly realizes have well thought out reasoning behind.

And then he gets irritated and intrigued because how does he keep doing that???

aventio detective au?

I MIGHT toss superpowers into this like how bsd does because I was rewatching season 1 through edits and then I realized that there is SO much potential for aventio as detective partners. Now, before you scroll, hear me out- I'm not going to copy from bsd, I'm definitely going to be taking my own spin on this, because what kind of author would I be if I didn't? Anyway, let's get down into my actual idea so that I'm not just rambling about the random details.

Detective partners Aventio - Dr. Ratio, who does logistics and banks on his knowledge, and Aventurine, who relies on his gut and good luck to find the heart of cases. Aventurine, who goes out to bars and talks to people, manipulating and scheming his way into getting information, an invaluable member of this agency that is amazing at what he does, yet annoys the shit out of Ratio.

Dr. Ratio, yes, a doctor, still in this au - who hopes to give criminals knowledge by capturing them and then speaking to them, set them straight with new ideas and philosophy. Dr. Ratio, a detective, and yet still a helper of the common people, getting through the nitty and gritty in order to bring new light to people who thought they would only have to steal and kill to survive. Dr. Ratio, who does not only believe in justice, but believes in helping others, and who has to sit down after his words cannot reach yet another 'mediocre' mind with a drink. This job is a hard one. Going out and speaking to people and picking up on details and helping the survivors who had to witness the horrors of situations is never going to be easy, but he is nothing if not a persevering man.

Aventurine, who grew up abused and taken advantage of in the slums of the city, who grew up being the crime that he now gets rid of - knowing that these people, sometimes, are just what they have to be, and yet, he does his job in hopes that maybe, his companion, who saw the hope in him, can set alight hope for others. Aventurine, who pushes through his bad habits and holds children who suffer in the aftermath, seeing a reflection of himself from the past. Aventurine, who vows to save the people - saving them, so that maybe, the child inside him can be salvaged as well.

Also, lots of drinking together and smoking. This is a fucking hard job, but they have one another, and they go out onto the field and stop stupid shit from happennig. They banter, they have childhood trauma, they kiss while being idiots, their coworkers help them stop cases, and maybe, MAYBE, I will give them superpowers.