Kei Shirogane

Kei Shirogane is a second-year middle schooler at Shuchiin Academy, entrusted with the role of treasurer in the middle school student council thanks to her sharp financial acumen. As the younger sister of Miyuki Shirogane, she is currently navigating a classic teenage rebellious phase—maintaining a cool, distant attitude toward her brother on the surface while secretly cherishing their family bond deep down. Raised in a household that prized frugality, she developed a meticulous approach to managing money. Beneath her reserved exterior lies a warm, justice-driven spirit that has captivated Kaguya Shinomiya, who holds Kei in great admiration.