His costume is also inspired by the Mask of Truth (white base, draping red with gold bits) and the Lens of Truth had a diamond shape in the center.

I noticed a while back and described it in more words in one of the SS threads. I've full faith that he's either a Sheikah or someone important to their history.

I never noticed his tattoo and eye to resemble the eyedrop symbol but it IS pretty hard to unsee so I'm gonna have to agree with ya.