"We could get through to Tseng, if we had to," Elena mused. "Get information from our Tseng, along the lines of, what would someone have to say for you to know that they knew something personal? Use that to get that Tseng's trust, and tell him what he needs to know."

They could do the same with Reno, except that Reno and Zack were never friends. Zack trusted Tseng, and vice versa.