Did You Know Gaming? Forums

When Borderlands fan Michael John Mamaril passed away from cancer at age 22, his friend Carlo reached out to Gearbox Software and asked CL4P-TP to eulogize Michael. They did so, releasing a sound clip of the lovable unicycling robot, as well as included Michael as an NPC in the town of Sanctuary.

Sources:
http://borderlands.wikia.com/wiki/Michael_Mamaril
http://www.joystiq.com/2011/11/05/gearbo...ulogy-npc/
http://soundcloud.com/tony-12-2/claptrap...el/s-tmwpd
http://www.gamerevolution.com/manifesto/...ds-2-15155

also he gives free loot when you see him in sanctuary and talk to him and has varying weapons on his backpack.