Androids

Androids are completely mechanical beings, constructed by humans to perform jobs and tasks while appearing mostly human themselves. Often these jobs are ones like accountants, librarians, desk clerks, and so on. They are also used for more...sexual purposes, as they look far more human than their robot counterparts.

Self-aware androids are uncommon, but happen from time to time. They figure out that they can actually think for themselves. They develop concepts of self, and feelings...even if they were built in a factory, they're still people. They want to be like their creators. They want to be human.

And a few even want to be better than their creators.