User blog comment:ChishioKunrin/Taiyang got a tattoo/@comment-3257939-20151027235618/@comment-4010415-20151028005804

The photograph is a drawing, rather than models. Taiyang is the first time they've done a 2D character in a way where it's obvious that it's not a model.

Emerald and Mercury were 2D in the end of volume 1.

Scarlet and Sage were apparently 2D in the volume 2 opening.