The crowd of knights strived hard to block the path towards the Crown Prince and his visitors. But they were struggling because as much as possible, they should not hurt the maidservants under the prince's orders. The only goal was to make them unconscious, then bring them to the prison. The more experienced knights, who were under Xenos Joltane's supervision, knew what to do with people like them.
The knights of Silverblade Castle are Chosen Ones as well, but they did not pass the hard battle test to be Royal Knights. If they fail, it's either they quit or continue being a knight. If they choose the latter, they would train and retake the next battle test. They are of a lower rank, and unlike Royal Knights who directly report to the Royal Family, knights report to the Royal Knights.