What I think Dick's relationship with the Justice League is like:
Bruce: ??? It's... It's really complicated. They're father and son, but also brothers but also friends but also work partners but also buddies but also argue a lot but also—
It's. It's a lot. So just "???" for now.
Clark: I'm very in between a father-son and an Uncle-nephew relationship, but they both trust and can rely on each other
Diana: n#1 Aunt. Best aunt. Amazing aunt. No one could ever top the Wonder Woman, like ever.
Barry: Your bff's father figure that you see so much he's practically family. Way past awkward friendly conversations, they nerd out together. Dick somehow understands his speed-rambles. It's adorable
Hal: Petty uncle-Petty nephew, or, as I said in a previous post "it's mostly fun divorced uncle-chaotic but adorable little nephew thing." but they get along wonderfully regardless
Oliver: A mix between Barry's "bff's father figure" and Hal's Uncle-nephew. Definitely spoiled him growing up just to mess with Bruce/annoy him, and Oliver had heard so much from Teen-Dick while venting with Roy
Arthur: He adores Dick Grayson. Dick asks a lot about underwater culture and is very excited to learn. Mix between mentor-mentee and uncle-nephew.
Martian Manhunter: They share sweets. That's it. That's more than enough (But they really enjoy each other's company a lot)
