It took only less than ten minutes from Christian's reaction to go from 'are you fucking crazy?!' to 'well, I suppose I have nothing better to do. Being in prison is so damn boring anyway.'
And hence, the matter was set just like that and Lu Yizhou obtained a lucky teammate he was hoping for. As for Percy, there was no need to persuade him to join the group. He directly offered himself as soon as he heard Lu Yizhou's offer to Christian.
For starters, he had been desperately trying to seek a way to escape the prison, and now he had a bunch of capable teammates, so why should he refuse? Moreover, Pandora was in that group… Pandora, whom Percy believed could grant his wish. Pandora, who was his only ticket to revenge. As long as he could get rid of Lu Yizhou, this pesky bastard, then he was certain that Pandora would definitely be willing to hear him!
Four people, each harboring their own thoughts, eventually formed a team to break out from prison.