Silpelit #7 or Nana (a common Japanese name, meaning Seven) was one of the Diclonius not euthanized at birth, but rather taken and experimented on at the Diclonius Research Institute. She has the physical appearance of being twelve to fifteen years old. Nana's actual age is about six to seven years old; the manga explains in greater detail that Silpelits age more rapidly than humans (or a "Queen Diclonius" like Kaede). She developed a parental relationship with Director Kurama and in fact believed that Kurama was her true father. This connection enabled Nana to endure the hardships and depredations of life as a test subject, as well as prevented her from becoming mentally unstable.