During my viewing of ABC's "AGENTS OF S.H.I.E.L.D.", I noticed that between Seasons One and Three, certain characters underwent a transformation or acquired powers through certain circumstances. Of the four characters mentioned below, three of them were transformed, thanks to a mist from a crystal called Terrigen. This led them to become Inhumans. The fourth character had been transformed via science experiments conducted by the terrorist agency called HYDRA. I also noticed that at least three characters also endured a serious physical transformation. Here they are:
TRANSFORMATIONS IN "AGENTS OF S.H.I.E.L.D."
However, Gordon's physical transformation was not as extensive or extreme as the transformations for Raina, Andrew Garner and Mike Peterson. So, could someone explain why three characters portrayed by actors/actresses of African descent had to undergo such drastic physical changes when they became enhanced beings? Or why the transformation for a fourth character, portrayed by a white actor, was not as extreme? Or why the fifth character - another person who was NOT of African descent, only underwent a name change and haircut when she became an enhanced being?