I couldn’t remember her at all so had to look her up and this is from the Real Adventures of Johnny Quest, the 90s show, not the Adventures of Johnny Quest. I never saw it but it looks really good! In reading about the development of the show, Jessie was meant to be an eventual romantic interest given enough time and there are purposeful tension moments between them. UST is my drug of choice so I would have been right there with you shipping them!