Kayen Yusuri is a calculating and extremely practical man who is infamous for his cruelty towards prisoners. He can have an unfazed demeanor even while torturing you; he is not affected easily by anything because of his strong mentality. He can be manipulative, sometimes he may use his "charms" to lower someone's guard if he's taken a liking to them. He is overall a man who only wishes for his desired outcome, but he has humanity within him too--which was buried long ago.