Normal external interfaces for humans were designed to look like all kinds of things, from carved natural wood to skin tones to jewels or stones or enamel art pieces to actual plain metal with a brand logo. And why would Eletra, who was an augmented human with an internal interface, need a second external one? And any remote chance that this was some kind of botched attempt at a medical or enhancement augment was outweighed by the fact that no human would put up with this when any MedSystem could fix it in a few minutes at most. And botched was putting it mildly; it looked like a bad human medic had jammed it in with their toes.