Xiaoqiao fortune-telling

Which hero in Killing Heroes can't be drawn in prison?

While she is still trying the prison herself, Xiao Qiao won't be painted if she loses her red card, but the prison won't be lost, and she has been there all the time. Liu Bowen can also read divination by herself and won't be painted. If Gou Jian puts up with it, it doesn't matter whether he paints or not. There is also a new hero, Sun Wu, whose black card can be said to be impeccable, so it is impossible to draw it.