The guards were just momentarily startled, but they quickly seemed to have recollected their thoughts as they looked at the Young Prince, and his guard like it was just usual work.
Of course, since they were dealing with the Young Prince, they had to show sufficient proof and sufficient strength, otherwise they couldn't deter him as they wanted.
Knowing the 'old' version of the 'Young Prince' they didn't doubt their success and that was also the reason why they had accepted the task.
Of course, word of what had happened before had kind of 'reached' their ears, but none of them actually believed the rumours.
Furthermore, even if the 'Young Prince' managed to overcome their trick, they had their backing in that 'person'.
Forget about the 'Young Prince' even the Queen herself had to think twice before dealing with them as long as they had that 'person' backing them.