The MK. III Mobile Robotic Versatile Entity Automated Assistant, shortened as MRVN (pronounced Marvin), is a type of Humanoid Robot in the Titanfall (Series) series. They appear in Apex Legends as lootable NPCs, and Pathfinder (Apex Legends) is a heavily modified variant of one of these robots.
There is also a highly upgraded and weaponized versions of MRVN — Spectre (Titanfall).