The Tatoos didn't devulge divergence. They are just a personal expression of art.
Might you be talking of "Four's" tattoo? I kind of wondered that too. Getting all the factions tattoo'd does seem to exhibit
divergence clues.
I'm not sure who he is. It looked like the male lead in the previews, though. They seemed to indicate through dialogue that he had all four faction symbols (I guess *shrug*) tattooed down his spine, as the centerpiece to a full-back tattoo.