Laxus
He tried to hide it. He wrapped it in coiling tattoos that lapped across his chest and down his back and arm, and tried to pretend that it was just a design, nothing more. But when it was taken from him, it left a hole that was strange and inexplicable, and it wasn't long at all before he realised that, just as the mark was integral to the balance of the other tattoos, the guild he had lost was just as important.
There was a reason why he had asked for it to be placed only inches from his heart.