Rika Makiba  

, 蒔羽 梨香

Rika, a young girl with an innocent heart, was well-loved by her classmates for her cheerful disposition and ability to brighten up their day. Despite being unofficially considered the mascot of her school, she struggled in the prison facility where she felt lost, scared, and overwhelmed by the horrors that awaited her. Her purity and sanity were closely tied together.