I feel like an important place to start is thinking about their character as who they are outside of being ace. Very often a lot of people tend to fall into a trap when it comes to representation by making the representation the character counts as half their personality. In my opinion, your character should be able to function as a character perfectly well even without their sexuality added in. Someone's sexuality, while being a part of who they are, does not, and should not, in my opinion, define them. A good example would be Todd Chavez from Bojack Horseman, who functioned perfectly well as a lovable and dorky guy who had just as much personality even before he realized he was asexual. In addition, I personally believe the way Bojack Horseman handles asexuality is great, especially in a case where your main character isn't ace, so studying the way it does so would be a good place to start once it comes to handling the asexuality of your character (this is once you've a...