The majority—including me—thinks that Kawaki will end up with Sarada. Their chemistry and similar experiences make them the perfect pair. There are a lot of proofs in which both of these characters make a great pair. One, Sarada takes notice of Kawaki's trauma and tries to cheer him up afterward. Two, she understands his feelings through their mutual admiration of Naruto and their view of him as a father figure. Three, Kawaki counts on Sarada and relies on her like she says he can. The third evidence is a huge deal due to his hostility toward others. There are still more instances, and I await how their relationship will develop in the upcoming episodes.