i have a feeling that maybe sarah will want them end up like his mom and dad? like yeah she didn't want to let the dad go but eventually she realized that she could never have him. his mom will make him return to their planet without sohan and she'll tell him that trying to make connections with humans long-term is a mistake.
just my prediction tho
i love both the characters and they are so cute together i just wish there was more development for rupard and maybe a chaser arc either after the first banquet when noah said he had to take care of his sick mom or after the mom died, since noah would’ve went back to his hometown to mourn his mother, she literally meant so much to him and they barely touched on that