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". Genderless, they/them, any pronouns.