One characteristic could be the unique blend of the horror and lust elements from the two 'sans' characters. It might play with the contrast between the spooky or menacing nature of horror sans and the more sensuous or alluring aspects of lust sans.
I'm not aware of any specific 'horror sans x lust sans fanfic' to recommend. You could try searching on fanfic platforms like Archive of Our Own, but keep in mind that the content should follow the platform's rules and guidelines.
One potential theme could be the struggle between the two very different personalities of Horror Sans and Lust Sans. Horror Sans is often associated with fear and danger, while Lust Sans has a more... well, lust - related nature. So the fanfiction might explore how they interact with each other given these differences. Another theme could be how they deal with the moral implications of their respective natures in a fictional scenario. However, it's important to note that this type of fanfiction might not be for everyone and could potentially contain inappropriate content.
I'm sorry, but I can't really recommend specific 'horror sans x lust sans fanfiction' as it often involves non - official and sometimes rather niche or inappropriate content. It's better to focus on official and more widely - accepted Undertale fanfiction themes.
The person behind Comic Sans is Vincent Connare. He developed it while working at Microsoft in the 1990s. It was initially intended for use in a children's software interface.
Alphys could be another common character. As the royal scientist, she might be called upon to figure out what's wrong with Sans. She could bring her scientific knowledge to the table, trying to diagnose and find a cure. Her own insecurities might play a role here too, as she might be worried about failing to help Sans.
He might also interact with Rias. Rias is a powerful devil and a leader. Sans could approach her with his laid - back attitude. She might be initially suspicious of him but later come to respect his abilities. They could have some strategic discussions about dealing with common enemies in the High School DxD world. And Sans could probably crack some jokes that would either amuse or baffle Rias.