Chikako has had few friends since a young age, instead spending most of her time playing board games. As a young child, she began to play the game Go, and her love for the game developed from a simple hobby into an obsession with its logical intricacy. Chikako has a habit of judging others based on their capability and ability to apply logic and reason. She has a habit of being incredibly demeaning to those she deems below her, often insulting and degrading them at any opportunity.