Kazuki Kurebayashi Husbando

Kazuki has a very friendly personality and often helps his sister and Rūko with the game, which he understands quite well, due to playing WIXOSS before it got popular and before he knew about the Selector Battles. He is a very kind and sociable person to people. In Episodes 3 and 10 of Infected, Kazuki admits that when he was younger, he was a very shy child and that it was because of Yuzuki, keeping him on the right path, that he was able to become the person that he is now. As a result, Kazuki is also not afraid to stand up to someone, if they insult his sister. Kazuki cares a lot about his twin sister, Yuzuki, and is willing to do whatever it takes to help her out with becoming an Eternal Girl e.g. this was seen in episode 2, where he met up with Momoko to meet a player who was willing to trade for an Adamasphere for a card, in order to help Yuzuki improve her deck. Kazuki is also a little bit clueless when it comes to girls, love and relationships and people's real intentions, as he was originally unaware of Yuzuki's feelings for him and the real reasons for why some of his classmates (including one particular female classmate) were trying to act friendly with him (because he was popular).