Rose "Rosie" Granger-Weasley (born c. 2006) was a half-blood witch and the daughter of Ron Weasley and Hermione Granger. She had a younger brother named Hugo, who was born about two years after her. She began attending Hogwarts School of Witchcraft and Wizardry in 2017—the same time as Albus Potter and Scorpius Malfoy.
Rose is said to have inherited her mother's intelligence. It is also noted that she put on her robes before needed, like her mother did at her age. If her father's encouragement to beat Scorpius Malfoy academically has any effect, she may also turn out to be rather competitive and academically brilliant like her mother. She seems to be quite close to her cousin Albus, Harry and Ginny's son, who is about the same age and who shared her anxiety about where he would be sorted at school. When she arrived at King's Cross Station to head off for their first year, Albus was "immensely relieved" to see her, and Rose beamed at him.