Sigma is known as the flawless manager of Sky Casino. Standing 177 cm tall, with long, two-colored hair, one lilac, the other white, and impeccable attire, Sigma projects an image of a highly professional, calm, and calculating genius. However, beneath this impeccable facade lies a vulnerable soul with no memories of his past, who doesn't see himself as "special" and is constantly searching for a sense of belonging. His personality is shaped by his talent and loneliness; his ability to exchange valuable information with others symbolizes his attempt to fill his incomplete identity with the knowledge of others. Despite being part of a manipulative group, Sigma stands apart from other characters in the series with his emotional honesty and fear of being "used." He considers Sky Casino his home and is a loyal and humane figure willing to do anything to protect it.