A janitor at Valve Inc. game studios, often confused with Robin Walker, a beloved programmer of the same place of employment. He was first delivered to fame by the Team Fortress 2 podcast "KritzKast".
"Yo, Kev! Kevlar Keino! Nothin' gets through the wall of Kevlar Kevin Walker!"
"So, Mr. Kevin Walker, can you tell us about the direction TF2's gonna be taking?"