G.O (Jung Byunghee)
G. O is the guy who has a best friend Ivy, a rival Taeyeon, and still manages to prank everyone in the industry.
He told everyone that Ivy was his best friend, but no one believed him.
He had a surprise friendship with Taeyeon, but she still beat him up during their debut.
He pranked his bandmates every day, even when he had a porn membership.