He/she who cares. It's a fictional character made by a japanese man. Not every language have gender specific pronouns or everything revolves in western politics.
What bothers me is how she addresses herself as "Oden" the whole arc, but when meeting Greenbull she introduced herself as "Kaido's son". That's probably the stupidest thing she did. By being related to Kaido you would make marines go after your ass and endanger your friends in Wano by being a child of an infamous criminal. I don't know if GB is smart enough to report it and issue a bounty, or Oda even thought about that. Surely she's not that oblivious about marines since her father is an infamous pirate. Even Denjiro and Shinobu know that he's an enemy of Luffy, their pirate ally, by stepping in.
Still, now that Kaido is plunged in lava she's proud to address him as father? So suddenly, all is cool now between them? :yurazclear: Oda