Is Shaitan only one guy?

Veronica asked on QRAC today. Well if Adam is metaphorical (see 7/11). Then perhaps shaitan is as well?

Someone admits her concentration is off :P

Had an interesting comment on Quranology Discussions.  A member admits what she does salat, some music is playing in her head. The question is, is the music player shaitan or Allah (who’s doing it to calm her down) ?