Marcus (Japanese: マーカス, Mākasu; English dub: /ˈmɑːr.kəs/) is an NPC in Xenoblade Chronicles X. He can be found at the BLADE Concourse in the Administrative District during the day, talking to Irina and two unnamed BLADE members. Marcus is a member of the Interceptors Division.
He is on Irina and Gwin's team in Chapter 7 when they discover a Lifehold in Oblivia. They then find Ganglion mechs in the vicinity, which Cross, Elma, and Lin defeat. As Marcus and Irina investigate a Lifehold, Elma commands them to jump off. They do so, avoiding a sudden attack by Goetia. The party then proceeds to battle her.
In Chapter 8, Marcus fights in his Skell to defend New LA during the Ganglion attack. He fights off enemies until multiple missiles lock onto him. He is unable to evade the missiles and is killed in the blast.