********
"Is that all right? Hand over one of Rei-san's Familiars to the man you just met. It's possible that that man will abuse that Familiar for evil." (Mack)
"Hmmm, I think I can believe it. And Mack. I have the advantage of having an exclusive contract with such a strong man, so I don't need to go into a few details." (Rei)
Intuition and on-the-spot accuracy matter to everything. If I get betrayed, I just have to give up because it has gone out of my intuition. At the moment it sounded, all I needed to do was ask the familiar who was with that man to destroy the leather bag that was used as his resurrection point and then kills himself. After that, the Familiar can return to this smartphone, and it's not too painful.