Rei Ayanami
Anime characters sometimes have blue hair, including Bulma of the popular "Dragon Ball" series, Sailor Mercury of the "Sailor Moon" series and Rei Ayanami of the "Neon Genesis Evangelion". One author, in writing of Rei, sees her hair color as a marker of both her 'unearthliness' and her introversion. Strong Bad, from the animated webseries "Homestar Runner", lampshades this trend by stating emphatically that in order to be a proper anime character, "You gotta have blue hair!"