Luke already knew that the cloaked boy had come from another world and had come to help as well. Still, he soon lost interest when he had chosen Frank to be the one who would face those so-called legendary overlords. Luke also quickly assumed that the fire titan that killed Rina's parents and the one who opened that crater in Shalia's world was one of those. Or at least they were at a close level. It would be troublesome if that weren't the case and the legendary overlords had the power to destroy worlds instantly. Truly troublesome...
"I thought that Frank was the one from this world that could help me with that work, but I was wrong," the cloaked boy said. "After I passed all my knowledge to him, he stopped being mindful of his actions, and he began to force people to become his followers. As you said, he noted that I was unsatisfied with that and made some of his men, people that I didn't meet, to infiltrate groups that would eventually join yours."