"Calm down. This isn't me saying my final goodbye. Alone, I can at least escape easily. But with you guys… I might actually be forced to fight till my last breath," Jiang Fei laughed as he retorted.
Jiang Fei was only so calm because he still had one last trump card he could use to kill his opponent for certain. The Core of Will had already recovered a little bit of energy, allowing Jiang Fei to use its powers to enter the 10th Dimension. Even if Alexis was stronger than predicted, he could never chase after Jiang Fei into the 10th Dimension.
Things would be entirely different if the girls were coming with him. He was not able to protect everyone and if they were in danger, he would have to buckle up even when he couldn't. The girls were too weak; even the strongest, Isabella, was an ant compared to Alexis. Rather than helping him, they would be causing trouble for him.