Aaron always understood his struggles + also admired how he just did things without caring about what other people think, I can definitely say Vale influenced Aaron a lot during their teenage years? When Aaron was more of a wallflower and didn’t really dare to do the things he wanted to, so with being exposed to Vale (and to an extent Luca, who on the other hand influenced Vale to become, uhh, reckless with the law, both of them sticked together like glue, so that’s also why Aaron got a bit influenced by their collective behaviours ), and spending time together, he’s gradually adapted a bit of confidence, and nowadays he’s the influencer whore we all know lol.
Long answer: Idk if you already know, they’re cousins, AHEM small compact lore dump coming ahead, but Vale never really got along well with most of his family members (the majority of them oppose how much he goes against societal norms, most of them are really strict, esp his parents), but one of the few people of his family he always got along with were his grandfather (lmao he is a menace… that guy is just like Vale, but more extroverted), and Aaron, they’ve been really close since their early childhood. Short answer: THEY GET ALONG REALLY GOOD!!!