Greta Bowie, also known as Greta Keene in IT (2017 film), is a character from the It: Chapter One as well as the IT novel. She is a girl who lives in the wealthiest part of Derry, Maine (West Broadway) and is a bully to Beverly Marsh and countless other students, including Eddie Kaspbrak.
It: Chapter One (2017)
At the beginning of the film, Greta is shown to be a bully when she goes into the girl's bathroom and begins harassing Beverly Marsh by calling her trash and a piece of shit. Greta also wrote LOSER on Eddie's arm cast and he later covers the S with a V in red marker, so it then spells LOVER.