Re. Bojack then (having checked) it's not until the end of S3 that Todd begins to articulate thoughts on his sexuality. So if the show doesn't work for you, that's a lot to watch... ;)

Also I have an asexual character in one of my stories, but he's only a side-character, so I am unsure how much of a spot-light to shine on him. It's still a work in progress.