Head cannon that even though Bruce is against tattoos (because he thinks they make u far too identifiable) the bat brothers have em anyways because why tf would they listen to Bruce, what were u expecting really?
Also I think the tattoos they have are accidently matching. They all have the Robin symbol.
Dick has the Robin R over his heart. Tattooed by Roy sometime after Bruce fired dick. Was it stupid? Yes. Does he regret it? No. He got it originally to keep his parents close to his heart. Then to keep Jason near his heart after Jason died. Then to keep as a reminder that all his brothers were robin. And that they were Dick's Robin's.
Jason got a Robin R tattooed at the pulse point on his neck. It's crudely drawn and fading, but he did it himself whilst in the league of assassins. He likes the dramatic irony of it. He is a literature nerd after all.
Tim has the Robin R on his ankle. It's bold and hard to hide but that was on point. He was drunk. And sad. And had just recently took up the mantle of red Robin when he got it tatooed by Leslie. He got for himself. As a reminder for what robin stood for.
Steph got it on her collar bone. Right under a left over scar she had from black mask. Cass did it for her. It was small and easy to cover up. Steph liked it. She figured it was accurate for her robin anyway.
Duke got the robin R tatooed behind his ear when he led the "we are robin." movement. He was angry and proud and he wanted to show it. It was wonky and done by a teenager in a Gotham alley but he liked it like that. After all robin definitely wasn't perfect.
Damian got it tatooed on his wrist. His is by far the most visible. He's proud. Proud to be apart of the legacy of the robins. (not Batmans, nor the al ghuls, the robins) It was a promise. To himself. To everyone else too, but mainly himself.
Errr also yeah Tim deffo got a sleeve done at some point, Jason has a back tat 100%, dick has one of them cool collarbone ones that look like rope, duke has his parents initials on his forearm, Steph deffo has a black widow quote somewhere on her body and Damian has stars littered on his shoulders.
