"Soul Immunity" 

No one knew that Jake had owned the souls of several transmigrators in his family relying on this ability and so, those souls were immune to any soul-control abilities because their souls had been marked by Jake's own ability. 

These transmigrators were also mixed with the few hundred transmigrators in the meeting room, and relying on their excellent acting skill, even the soul masters were fooled. 

Of course, some senior soul masters noticed the soul marks on these people's souls and were so upset that they had to change their targets! 

Now, to appease Ainsley and not let her worry, Jake used his trader ability to make a deal with Ainsley, swearing that he would not misuse the control over Ainsley's soul in exchange for Ainsley's willingness to have her soul controlled for a while.