Flurry Heart is the only daughter of Shining Armour and Princess Cadence of the Crystal Empire
she is the heir to the throne of the empire when she is older she will take on after Cadence to keep the peace in the empire
Aside from Midnight Flurry Heart is another one of the oldest in the next-gen group.
she is Midnight's best and closest friend since they grew up together, staying friends when Midnight became a princess once she had come of age
Flurry helped Midnight find and reunite her with Eclipse, Midnight's lost older sister and then later helped find her parents Aqua and Meteor.