Both of them intended to scare the assassin away.
Whether it was an enemy of the Imperial Residence or an enemy of the High Duke's Public House, they did not want to meet the assassin at all. With the current situation, should the both of them get into even the slightest accident, King An would probably take the opportunity to exterminate them and then blame it on the assassin.
However, they could not call or shout out loud, so they could only scare the assassin away with their appearance.
The assassin was just an Innate Master, if he were to face two Grandmasters, his odds of winning would be none. Presumably, he would not show up.
"Tss!" A soft sound was heard, and their eyes suddenly widened.
They watched as a jet black sword shot out abruptly from the ground, and pierced through one of the Protector's throat.