Raphael Santiago, leader of the New York City vampire clan has a penchant for being a tad over dramatic, a lack of patience and is asexual. Amid all the scowling and fighting, Raphael had found a short lived romance with Shadowhunter Isabelle Lightwood. Although, she is a sexual person, he made it very clear that sex was not something that appealed to him. He cared for her but sex was not one of the ways that he would be expressing his feelings for her. Alas, their romance was doomed mainly because she was addicted to vampire venom and he was becoming way too fond of her Shadowhunter blood.
Anyway, I noticed that you don't see a lot of characters that are asexual in the media. We live is a very sexual world but there are people who have no interest in sex and shouldn't be made to feel as if there is something wrong with them. I commend the Shadowhunters TV series for continuing to do a good job with positive representation from diverse casting to showcasing LGBTQ+ characters and issues.