Hanayo Renjou

Hanayo Renjou is a second-year student at Tokyo Metropolitan Mikawaguchi High School and a close friend and classmate of main character Kashina Kusakabe. Her personal trademark is a handmade hairpin crafted by her mother. Timid and highly sensitive by nature, she repeatedly witnessed doppelgängers that looked identical to herself and her family members, which caused her overwhelming fear and eventually led her to fall ill. She stands at the center of the story's 'doppelgänger phenomenon' incident.