It's time to start listing some of your characters' attributes. One of the most fundamental is their gender.
For every character you are going to want to check the gender box on their interview sheet: Male, Female or Undecided.
Most characters will have an obvious gender, though some (like a shark or the wind) might be neuter or indeterminate. Usually, a gender helps the reader know how to relate to a character, as it is one of the first things humans instinctively try to determine, right after friend or foe.
Gender alters our entire sense of a person, critter or entity, so note one for every character in your list, if you can. Don't be afraid to experiment with assigning a gender other than your original intention, but don’t overthink the plumbing, as it were. For now, just go with the obvious choice if you like and we’ll mix things up a bit later on.