Google Talk Idle contact with unfamiliar email


Well-Known Member
When I open up Google Talk on my android I see an idle contact who's title name looks familiar and when I view contact, I see the familiar gmail email and phone, but under the name in google Talk I see an unfamiliar email that looks like this that is not in my contact for them.

What does this mean?

Did and does that contact communicate with me via their gmail account? Most other friends in Google Talk have their status where that email is listed. Is that just a custom status with an email in it?