|Age:||5 years old|
|Relatives:||Kurama (Genetic Father)|
| Character Information
|First seen:||Chapter 80|
|Last seen:||Chapter 94|
|“||Are you stupid or something? I'm supposed to help you out? I'm the one who's gonna kill you!||”|
Diana was one of four wholly viable clones of Mariko along with Barbara, Alicia, and Cynthia all bred by Nousou. She was the first one to be seen without a restraining helmet. A mind-control device placed on her forehead made her obedient and also made her and the other clones unable to speak, except for the simple word, "Myu." To placate Chief Kakuzawa, Diana was ordered to stab herself with a knife in order to prove her loyalty, first in the arm and then in the heart. This left her unable to join the assault on the Maple House, although Nousou arranged to have a new heart implanted in her. Later, she was found and revived by Arakawa during the Diclonius uprising at the research facility. When she defended her against the other Diclonii and was wounded, Arakawa removed her control device. Diana quickly regained her true personality and tried to kill her, after which The Agent reattached the device. She continued to defend them until she was finally killed (either simply decapitated or her head exploded) by the other Diclonii. From Diana's odd and fearful behavior around the Anti-Diclonius Birth vaccine, Arakawa was able to determinethat the Diclonii could sense the danger it posed to them, which later aided in its recovery from the island.