Post a very common and stereotypical character architypes anime uses over and over.

I start - Tank Girl. A girl with glasses, long straight hair as in a picture, and usually an assistant of the main heroine - either mechanic, secretary, student or whatever.

Examples of anime used: Azazal-san, Agent Aika, Tank Girl movie (not anime, yeah), whatever that hentai OAVs about the detective and many others.

Can be associated with following trope: http://tvtropes.org/pmwiki/pmwiki.php/Main/WrenchWench