She is more reserved and does not talk unless needed. When it comes to Cardfights, she is very serious and is known to never hold back. She, along with Suiko and Rekka, is part of the international idol group called Team Ultra-Rare. She later on develops a good standing relationship with Aichi and his friends.
Unlike her anime counterpart, she uses a Gold Paladin Deck that focuses on Ezel instead when she enrolls into the same school as Aichi. She does, later on, join the club Aichi made, though she did challenge him to a Cardfight to earn her stay in the club, or rather she wanted to test him. When Naoki said that he wanted to join the club, Kourin said that he must defeat her in order to join. After a difficult match since he was still a beginner, he won his stay. When Misaki wanted to join the club, she was the one who battled her and won against her. Kourin wanted to test Misaki to see if she had PSY Qualia, though it turned out she did not have it as it seems.
In Volume 6, it was mentioned that although she does live with Suiko and Rekka, they are not sisters at all and they do not share the same blood, unlike in the anime where they are sisters though they never mentioned their parents.