My upcoming project is a drama/action comic, and my main characters are a younger brother and older sister duo in their 20's. Of the two though, the sister is the more important one to the story. So far the cast is almost even but it's hard to tell sometimes because there's two of 'em that are just enough to be considered as characters, but not enough to drive a particular part of the story.
As a guy myself, I've been having a general lean towards writing female characters since I started writing a few years ago. I don't find a lot of male characters all that interesting creation-wise tbh lol too many of 'em ended up being real straight-forward in personality and backstory for me. It's only a small handful of 'em that become just as complex and compelling as the female characters I've written imo and like.. I dunno if that's a reflection of how I personally see my relationships with people I know in their respective genders, but it's interesting to think about for sure~