As impractical as it is improbable, Mariah's outfit nevertheless marks her as a hero: bit players in the saga tend to have more standard Conan comic attire. Note the Farrah Fawcett feathered hair and the colored eye patches that were sported by several comic characters in the era.
As the years go by, Mariah's hair changes a little bit--and when Ron Randall takes over, her costume gets a bit skimpier. Then after the "Morgan's Quest" saga, Randall gets into a bit of costume experimentation:
Here we see what must be Mariah's "lounging about the castle" outfit. (This is an idea with precedent: Tara and Morgan got them in previous issues.) It's a pretty 70s design despite the era; it recalls the duds of DC's first Starfire. Not that she's got kind of 80s hair, though, and the eye makeup has expanded beyond the old raccoon eyes look.
When next Randall has her back in her standard outfit, it's been subtly (or maybe not so subtly) altered. It's just as revealing, but more a more complicated design. She's now sporting hair and a headband borrowed from some aerobics instructor. Her eye makeup is asymmetric has gotten all Jem and the Holograms (which started around this same time--this stuff was just the zeitgeist).
What's next for Mariah? Come back next Wednesday and find out.