Kazuhira “Kaz” Miller made his debut as an informant in the Metal Gear Solid series with Metal Gear 2: Solid Snake for the titular legendary protagonist, but he really didn’t get some proper screen time until a future Metal Gear Solid game, with Metal Gear Solid: Peace Walker onward, where his younger self guides and supports Big Boss during their days as paid-for-hire mercenaries, all the way up to the fifth mainline entry in the series.