Alex

From Rom Com

Alex is a friend of Kati with whom she is very competitive. They come up with a bet which leads him to seduce many people, including at the very least Hallie, Aimee, and at the end Kati herself. His character's name is most likely Greg.

Alex appears in the following scenes:

Opening
Alex and Kati's Bet
Alex/Hallie Seduction
Chekhov Play
Photo Montage
Hallie's Cheating
Confrontation
Dinner Sincerity
Dylan/Alex Confrontation
Alex/Aimee Seduction Two
Alex/Kati Moment
Climax
Alex and Kati's "Reparations"
The End (Everyone)
The End (Alex and Kati)