He has a "princely" image which he puts on to mask the fact that he is a sadist. Aside from Erika, he treats everyone else in a sweet and polite manner. Artificially, that is. As time goes on, it's revealed he treats anyone who tries to get close to him cold. Gradually, he develops a protective attitude towards Erika whenever she associated with other guys. He is also seen getting jealous a lot. Kyouya has been described to be a "tsundere". His personality gets better as time goes on. Looking for a medium-low voice. He's a very two-faced guy, so you have to go from cool prince charming to like Christian Grey at a flip of a switch. 0 to 100 real quick I know lol.