Personal headcanon that even though Kaldur has officially dropped out sorcery school, he still stops by sometimes to try and hone his abilities Because he doesn't attend regularly, he is very far behind, which means he probably attends classes filled with young teenagers, who are absolutely in awe of having THE Aqualad/Aquaman attend their classes.
I just think it would be extremely motivating to have your country's hero, who has saved the world numerous times, learning how to perfect his sorcercy just like you.
It's a great experience because while Kaldur is skilled, he isn't perfect, which means he doesn't always get the spells right and he is not afraid to go and ask for assistance from his classmates (which again, would be teenagers. Imagine going home and telling your parents that you helped one of the member of the freaking Justice League how to improve his sorcery technique).
Is it wrong that sometimes I just wonder like. How horny 18 year old Roy Harper was? Like, him on the team, in a relationship with Kaldur, in a situation where they can spend a lot of time alone. I’m not saying it’d be their whole relationship, clearly, the two adore each other and wanna be cozy and sweet and domestic and snarky and brawly sometimes too.
But Roy would be a terrible influence. M’gann and Conner come home from school and Roy’s got Kaldur in the pool/ocean access, trying to find out if salt water is bad for his dick. Kaldur getting distracted in training because Roy’s all flirty and sweaty. Roy unashamedly admiring Kaldur when he’s working out.
Roy sneaking Kaldur out for cute dates and sexy rendezous back at his apartment. The team calls Kaldur, Roy keeps nibbling on his neck while Kaldur tries to talk to them.
It’s not the main way I think he’d help Kaldur loosen up, but I do deeply adore the idea of Roy being a hormonal shit and Kaldur not at all being immune or above it.