Nerd 4: The Unknown Nerd
Also known as "The Enigmatic Enigma of the Inconspicuous", Nerd 4 was last seen lurking in the corner of the room, sipping on a Red Bull energy drink and muttering something about "Dark Matter".
It is rumored that Nerd 4 has a PhD in "Extreme Crocheting" from a reputable online University, and is secretly a professional snail trainer.
Some have speculated that Nerd 4 is, in fact, a time-traveling wizard from the land of "Nerdtopia", but this has yet to be confirmed.