The Bloody Twins, Didi (ヂヂ, Didi?) and Gigi (ジジ, Jiji?), are a pair of brutal serial killers that are loyal to Birds. As such, they are part of the Kokuyo Junior High Gang. They were first seen in the Kokuyo Arc where they were used to blackmail Tsunayoshi Sawada, Hayato Gokudera, Bianchi, and Takeshi Yamamoto; however, they were then defeated by Shamal's Trident Mosquito and Future I-Pin's Haisangen.
They are bald, has grey skin and wear green Kokuyo suits. They are very tall and skinny. Their faces look mutated because of the long term restraints they were placed on in the Vindice Prison. They have distorted movements that include squirming around and waving their arms. They have long fingernails that are used to lacerate and scratch.
Didi and Gigi were serving out a sentence in an Italian prison when they escaped with the others in Mukuro's gang. They went with him to Japan in search of Tsuna so that Mukuro could possess him and destroy the Mafia, a stepping stone for their plan to eventually destroy the world.
Before Birds engaged Tsuna and his group, Didi sought out and shadowed Haru while Gigi sought out and followed Kyoko.
Once Birds gave them the orders to kill Haru Miura and Kyoko Sasagawa, Didi was impeded by Shamal, who allowed Kyoko to get away. Before Gigi could fight Shamal, the Vibration Syndrome he had been infected with surfaced and incapacitated him. Didi tried to kill Haru, but he was stopped by Future I-Pin, Haru being led away by Future Lambo. Before Didi could pursue them, he was defeated by Future I-Pin's Haisangen maneuver. It is unknown what happened to them afterwards.
- Like everyone else, Didi and Gigi wore Kokuyo uniforms because, according to M.M., it "amused Mukuro."
Differences from Anime and Manga
In the Anime, they have very shrap fingernails to slice and lacerate their targets. In the manga, they use bottles of sulfuric acid.