Thad

Thad, originally called "That Guy" by Robin DeSanto was the "Lone Customer" who confronted Ethan for the events during Ethan's time as Anti-Ethan. It was assumed for a while (mainly by Robin) that Ethan and Thad would become an item. But it turns out that Thad is in a relationship with Evan, Ethan's opposite from McAwesome's Parasailing and Chocolate Bakery.