User blog:GoldenXxRaven/HELP WITH CATEGORIES

How do I create a new category? I want to create The Disastrous Life of Saiki K./Characters/Male, but I don't know how to create a new one. I looked up but nothing helps, and there is already The Disastrous Life of Saiki K./Characters/Female.

Please, if someone knows about this, let me now ;-;

Thanks ^^