Outside of Wonder-related characters (Etta, Donna, Cassie, Nubia, etc.), which five or six characters from the greater, broader, non-Wonder DCU should be close friends with Diana in a way that allows the characters to compare and contrast against one another in stories for character growth?
I’m thinking of examples along the lines of Batman and Superman/The World’s Finest, Green Arrow and Green Lantern (for a time), Booster Gold and Blue Beetle, etc.
(Also, in my mind this does not replace her relationships with the Wonder cast - I’m of the opinion Etta should be Diana’s BFF - but it’s in addition to them.)
I have some thoughts, but I’ll wait to see if anyone else is interested in this topic and posts.