ZGMF-X05D Diablo Gundam (Conflicted Hearts)

The ZGMF-X13D Diablo Gundam was a ZGMF-X Mobile Suit, a nuclear reactor-equipped Gundam, built by ZAFT under the command of PLANT Supreme Council Chairman Patrick Zala during the Bloody Valentine War in hopes of reverseengineering the techology and neutralizing the technological advantage gained by the Earth Alliance following the Heliopolis based G-Project.

Out of all of the ZGMF-X Mobile Suits, the Diablo was built with combat data from one of their ace pilots: Isao Kofun, that was regularly updated and sent to the PLANTs after every battle. Given Isao's compatibility with the YMF-X000A Dreadnought Gundam simulator with DRAGOONs programed into the data, Zala decided to scrap his intent to give Isao the ZGMF-X10A Freedom Gundam and instead used the Freedom Gundam's chassis as a base to develop this Mobile Suit onto.

It would become the older sibling of the ZGMF-X13A Providence Gundam, which had fallen behind production due to incompatibilities with the DRAGOON System due to the stress of the number of DRAGOONs that could be used at once, ironically the Diablo would outlast the Providence and later be used once more actively during the Second Bloody Valentine War.

Trivia

 * Diablo is a spanish word meaning "Devil".