Nine's personality appears to be based upon the exaggeration of the skater subculture in the late 1990's and early 2000's, using slang such as "tubular", having sunglasses, and owning a skateboard, which was very popular around that time period. As a result of this, Nine acts like they're very cool. Nine also appears to get sensitive at times, as they cry after Six says that they have no "style". They also might not be the brightest of the bunch.