Xia Wuji (I believe everyone knows the pronunciation of "ju" here) and Gao Jianli.
When I read the text "Jing Ke Assassins the King of Qin", for some reason, my first impression was that there must be something between Xia Wuji and Gao Jianli, and the reason for this feeling seems to be just that I personally like the names of these two people O(∩_∩)O~
In addition, there is also a pairing between King Qin and Prince Dan of Yan. On the TV, Jing Ke helped Prince Dan of Yan pass the sentence to King Qin, "Do you still remember the Dazheng Palace back then?" It is really fascinating (^o^)/~