Which character breaks Myrtle Wilson's nose during a Manhattan apartment party?

Tom Buchanan breaks Myrtle Wilson’s nose during the Manhattan apartment party in The Great Gatsby. The assault occurs after Myrtle repeatedly invokes Daisy Buchanan, Tom’s wife and the subject he does not want challenged.

Tom brings Myrtle and Nick to a small apartment in New York City that he rents for his affair. The gathering grows crowded and drunken, with guests drinking, gossiping, and treating the apartment as a stage for a glamorous life outside Long Island society. Myrtle begins acting as though Tom’s affair gives her status equal to Daisy’s.

When Myrtle chants Daisy’s name, Tom responds with sudden violence, striking her and breaking her nose. The moment exposes the brutality beneath the party’s apparent sophistication. It also establishes Tom’s pattern of controlling others through intimidation rather than affection or reason.

A common mix-up is to assign the injury to George Wilson, Myrtle’s husband, or to Gatsby because the scene is part of the novel’s chain of betrayals. Neither man is present at the party when Tom attacks her.