Well I liked Kyuma he was honest, straight forward, cool and loved his team.
But my favorite was Chishiya. I liked him in season 1 too because of his calm and scheming nature, but in this season he stole my heart more than the mc. In this season he showed that he is slowly changing and started to become more compassionate. He chased away his teammates in episode 1 in the game of the king of spades even if he was left behind. He recognized the kind nature of his teammate in the Jack of hearts, he was honest with him and he even listened to him every time his teammate was stressed . In the game of the Jack of diamonds in the end he played with open cards and let his opponent decide his fate. Many can think that he did that as a strategy to win, but I think that he didn't care about winning or losing, he just wanted to see his opponents true feelings and heart, he wanted answers from others, because he couldn't understand his own heart . When he won he was moved, rethinking his life choices and wanting to change. That resulted to even save Usagi using his body as a shield, something that he would never do before. He had the best character development of them all and he was cool all the way.
Sorry for the lengthy explanation