Responses
Those are good theories, also according to what I saw, Lancelot knew the fl before his brother was emperor, so he probably fell in love with her and he left after she died.
Oooh I also like that theory. But poor Lancelot always leaving because of heartbreak
I hope this time he can be happy with the emperor ⁄(⁄ ⁄·⁄ω⁄·⁄ ⁄)⁄
So in my previous theory Lancelot was Gay for the Ares which was why he would always give the Ares money and eventually left the kingdom despite being begged to stay because the Ares got together with that other princess.
Second theory, Lancelot and the emperor got close over time and Lancelot eventually develops feelings for the emperor. Right now is too soon since the emperor is too young. So this would occur over the years. But because the emperor becomes a tyrant, Lancelot sides with Ares to stop the emperor. Unfortunately, the emperor dies and Lancelot leaves because of heartbreak.