Dimitri was the pilot of the MA-04X Zakrello mobile armor. During the White Base's ascent to space, he witnessed his fellow mobile armor pilot Tokwan die at the hands of Amuro Ray in the RX-78-2 Gundam. Dimitri requests to head out to battle following Tokwan's defeat, but is told by Char to wait, as they will have other chances later. Dimitri instead gets permission from Char's subordinate Mulligan to head out in the Zakrello. He is quickly defeated and killed by Amuro, piloting the Gundam Sky.