If you are looking for the After War Gundam X: Under the Moonlight manga character, please see Marco.
Marco Morassim (マルコ・モラシム) is a minor character appearing in Mobile Suit Gundam SEED.
The commander of a ZAFT submarine carrier force assigned to the Carpentaria Base. After Rau Le Creuset requests his aid in the pursuit of the Archangel, Morassim becomes determined to outdo the upstart Le Creuset by destroying the enemy ship himself. This veteran soldier often enters battle as a mobile suit pilot, and he's equally adept at the controls of the aerial DINN and the underwater ZnO types.