Maller

Maller was sationed aboard the UNSC Red Horse and was sent with Sergeant Lopez, Benti, Clarence, and several other marines to investigate The Mona Lisa. After breaching the ship, Maller, Simmons, Cranker and Sydney were ordered to guard the Pelican that brought them there, in case that they needed to get out quickly. The Flood eventually infected Maller and the other marines.

While he was infected, he and Cranker were waiting in front of the rear hatch of the Pelican, presumeably because they could smell Burgundy, the pilot. Not knowing that Maller and Cranker were infected but badly wounded, she opened up the rear hatch, only to see that Maller and Cranker were no longer human. They attacked Burgundy, injuring her and brought her to the engine room, ignoring Burgundy's pleas and begs for life. Cranker, with Maller behind, entered the engine room where a Proto-Gravemind was being formed. They pushed Burgundy into the Proto-Gravemind and, according to Benti, "That was when she really started screaming''. Benti, however, and threw three primed grenades at the   amassed flood, destroying the Proto-Gravemind and, presumably, Maller.