Nagisa spent most of her childhood confined to a hospital bed, dealing with a congenital heart condition that left her physically frail and kept her from attending school or playing outside like other kids. Things changed when she received a heart transplant about a year before she met Kimihiko Kimizuka—a procedure that turned out to be life-changing in ways beyond the obvious. The donor was Siesta, though Nagisa wouldn't learn this connection until later. Along with the transplant came something unexpected: she inherited one of Siesta's legendary "Seven Tools," a musket gun that would become part of her arsenal.
Content compiled by AnimeList.moe from publicly available sources.
