Rui's plan was straightforward.
He would employ his Mind Mask technique and diminish his presence to an Apprentice level and his appearance and identity with a mask. The Martial Apprentices all wore masks anyway as Martial Apprentices normally did, so there was nothing suspicious or abnormal about that.
The Martial Apprentices had all been debriefed about his presence in the operation. However, they had all been informed very firmly that Rui would not divulge his power until the Martial Squire appeared. He would be operating at the level of a modern grade-ten Martial Apprentice of the Martial Union. When, and only when the Martial Squire from the K'ulnen Tribe would be deployed would he intervene and fight with them.
They were to retreat when that happened, for they could all potentially die being near the fight between Martial Squires.
