Cai Kun is a man with a strong metal control ability. He attempts to break into Gu Yunxi's villa at night with the intention of assaulting her. He is confident in his ability, which can manipulate knives and forks. However, he is killed by Lin Lulu's amplified light arrow (enhanced by Gu Yunxi's adjustment). His corpse is then burned by Ji Chuan, leaving only a purple crystal core, which Ji Chuan absorbs, gaining the ability to fly and significantly evolving.
