I present to you Thane Krios. He is Drell assassin, soulful murderer, and incredibly sexy reptilian man. Allow me to paint a picture.
Going back to the beginning, the design team had attraction in mind. As BioWare’s art director Derek Watts explains, because Thane was a potential love interest character, “women were going to have to find this guy attractive.”
Drell are physically the most human-like aliens in the Mass Effect universe, other than the Asari, which helps Thane to appear exotic rather than bestial, despite the obvious animal influence in his design. Thane’s presence is definitively athletic, including that perfect male waist-to-chest ratio and a clearly defined symmetry of body enhanced by his symmetry of clothing. I’m sure it doesn’t hurt that he’s clearly wearing leather, Hollywood’s token cultural symbol of the “bad boy.”
However, Thane is far from your average bad boy.