The KKR-9 Ox was the personalized fighter of pilot Jason Small of The Flyboys squadron around the Cruentusian War. Based on a Simiyar Tech prototype for the Necasian Military that was cancelled, the Ox was built from a copy of said prototype with modifications by Flyboys engineer Butch Horsin. Considered well-rounded in most respects, the Ox was reputed as being difficult to handle for all but Small. It had a unique exhaust system which ejected fumes as nitrogen, which in some cases could be liquidized, allowing the fighter to freeze all beneath it when flying low in an atmosphere. The targeting computers were also programmed by Small, and were considered very accurate and precise comparatively.