#preston

If it's relevant to lore, it makes sense that Kane and Jude wouldn't mention them, because they already know about the tattoos and therefore wouldn't feel much of a need to point them out. Dahlia and Violet probably haven't even seen them, considering Preston is usually described wearing a jacket/long sleeves.

Which makes me think that he's hiding them for some reason. Or at the very least doesn't feel the need to show them off. We already know that RK characters have meaningful tattoos, and I doubt Preston is any different.