Sayaka Koyanagi

Sayaka Koyanagi serves as the commanding leader of the Collectors, a faction dedicated to putting an end to the alien-orchestrated game. Betrayed in the past by a teacher she once deeply trusted, Sayaka developed a cool, calculating demeanor paired with an instinctive wariness toward others. Her unique ability, 'Binding Contract,' reflects her profound yearning for genuine loyalty and unbreakable bonds. Throughout the story, her exceptional leadership and tactical acumen make her an indispensable pillar of support for the main cast as they face formidable adversaries.