Who Did It?

"Ah, stop playing with my hair!" Katie suddenly started shouting at the people. They were having a family dinner party that time, and a lot of people came to Katie's house. Katie turned around and wanted to see who sat behind her. Rosalie, who sat straight behind Katie, waved her hands and said, "It was not me! Actually it was Joe!" She pointed a guy sitting next to Katie, who was chatting with others. "No! It was you! Joe doesn't look like a person who just played my hair!" Rosalie laughed and then admitted she just played with Katie's hair.