Shirokawa Incorporated CEO
"People's lives are more important than money."
Kishiro is the CEO that Mashiro has the save in The Quarter Game. She is also Mashiro's mother. Though being a powerful and rich CEO of Shirokawa Incorporated, she is a very caring person. This leads her to refuse Knell's offer on the new, but dangerous technology that Shirokawa Incorporated has developed. Because of this, she was kidnapped so that Knell can get his hands on that piece of technology.