The color hot pink usually serves two purposes. It can be used to show childish innocence, or a characters child-like personality. It can also be used to show a more flirtatious personality. Hot pink is normally a color associated with girls and femininity.
Hot pink is considered a color of good health and life - we speak of people being "in the pink" or the "freshness" of a newborn babe.
Lastly, Hot pink is associated with sexuality, and purity. That is, a girl who is a virgin in heart and body. Hot