The fan-girls don't expect this man to show up in their line of sight. They treat him as a distant dream. Many fan-girls have fun under his Twitter, regardless of whether Dean will respond.
They never dreamed that Mr. Reed would update his Twitter, and keep up with trends, and post something related to trending topics.
When the fan-girls took a closer look, they realized that their dream man had retweeted Joy's tweet and tagged Mr. Finch or validation.
What was going on right now!?
Fan-girl 1: I remember now, the man who sat next to Fairy last time was Mr. Reed!
Fan-girl 2: I remember now too, when this trend first came out Mr. Cohen even stood up for Fairy, criticizing all the rich girls who had conflicts with Fairy.
Fan-girl 3: So, Fairy dares to be so bold because she has such strong backing?
