Slytherin, unlike her father. Rosie is the daughter of Gilderoy Lockhart and Olympe Murray (Olympe is the great granddaughter of Eunice Murray). The female has straight blonde hair and blue eyes. Pureblood and proud. Rosmerta is clever, ambitious, cunning, witty, determined and crafty. In the beginning of the story, she's 12-years-old (she is still a first year, just a few months older). Sorting hat had a little deliberation about putting her in Ravenclaw but she convinced it to put her in Slytherin. In second year, it was discovered that she had a Dark Mark and she claimed that it was put on her by force before the first Wizarding War. In fifth year, Only got one O and three Es. The rest were As and Ds. In seventh year, she escaped judgement on her dark mark by flying away before they could take her to Azkaban.