That is a picture of Susan Moskwa, a Google Webmaster Trends Analyst, who works with the search quality team at Google.

Someone sent her an email requesting a link exchange. In fact, it is fairly common for Googlers, including top well-known Googlers like Matt Cutts, to receive link exchange requests via email.

Susan posted on Google+ the email she received and the response she sent back. Her response was, you and your site violated Google’s guidelines and will be reported as such.

Link exchange email request:

Here is Susan’s response:

Serious response!

John Mueller from Google said that he gets between 3-4 a week of these a week.

Forum discussion at Google+.