Or a supporting cast, or much of anything, really. The only constants in Diana's long career have been her mother, Themyscira, and occasionally Steve Trevor - and even those can't always be counted on. Say what you will about the Marston era, but it had continuity and a set cast of characters and plot devices - Etta and the Holliday Girls, the mental radio, Steve and Colonel Darnell, Mars and his minions, the goddess Aphrodite - which were a regular part of the series and tied everything together. Subsequent writers dumped most of that, added their own ideas, then dumped THOSE, too! I mean, wasn't it Robert Kanigher (I think it was him, anyway) who added a whole bunch of things to the mythos - Merboy and Bird-Boy, the Glob, Wonder Girl and Wonder Tot - only to literally lock them all away in a drawer when they got too complicated? (One wonders what would happen if somebody did a Grant Morrison and OPENED the drawer again...) The only consistent thing we got from that was Wonder Girl, and hasn't SHE been a treat for continuity over the years. Ever since then, almost every writer who's handled the character has erased or ignored most of the plot elements added by the previous writer while adding their own - and the next guy does the same thing. Basically, both Batman and Superman have evolved in a more-or-less natural manner from the original creations of Bob Kane and Jerry Seigel. Wonder Woman has not, and this is to her detriment.