I'm always on my Bruce acted like Damian when younger shit, but I'm also on my Oliver was eerily similar to Cass when young bullshit
Look, that man might have been stranded on an island for a year(s) but no other person would get into that situation and decide that the most reasonable choice was to dismantle the drug ring on the island with nothing but a bow and barely any training.
So I like to think that Ollie was always a little fucked, just uncomfortably wrong in a way that most people wouldn't understand. that actually being why Bruce likes him when they first meet.
Him being unnaturally quiet, not when speaking of course, it's Oliver Queen, no one can get him to be quiet when speaking unless he wanted to, but quiet in the way of being able to sneak up on people without even trying. Just appearing in a room and scaring everybody, even when someone is keeping an eye on him, he'll inevitably slip away and reappear a few hours later in a place that he's not supposed to be.
when Bruce and Ollie first met, Bruce liked him because he kinda scared the shit out of him, there was a look to him that just set off of the warning signs in Bruce's head and of course that means that he needed to friends with Ollie immediately.
And later, when Bruce's mouth inevitably got him into trouble, he never had to worry about what would happen after he won because Oliver would always jump in first. people learned very quickly that you can't fuck with one of them without the other being there too.
in the first few months of Oliver being the GA, Batman comes to Starling for something and tries to slip away after being spotted, but Oliver is able to hunt him through the city. No matter what Bruce tries, GA is always two steps behind and getting closer. finally Bruce is able to lose him at the edge of town (Oliver doesn't lose him, he just knows that Batman is leaving and sees no reason to keep going after him) and decides right then that the Green Arrow is never allowed within Gotham, that no other vigilante is allowed in Gotham.
Years down the line, after the JL is up and both of them are in it, Bruce questions whether he should tell Ollie that he's the Bat, but Oliver already knows, has know since the first time that they fought side by side, because no one has fit so perfectly beside him since those days in school. the days that he was the blinding sunlight in front, the fist that everyone paid attention to, so no one noticed the dark shape in the shadows Oliver had cast, the knife that you didn't even realizes was there until it was being pulled out of your ribs. of course Oliver knew that Bruce was Batman, he would have shot him with an arrow on that first mission if he hadn't.
