Rebecca

A daughter of a Pheraean village chieftain, Rebecca is tomboyish, helpful, bright, and enjoys cooking. She joins Eliwood's group to search for her missing brother Dan, who, through support conversations, is hinted to actually be Dart, Captain Fargus' most trusted mate. He left her, along with their childhood friend Wil, on a journey 5 years ago, and has been missing ever since. She later becomes a retainer and nanny in the Pheraean court. If Rebecca and either Wil, Lowen, or Sain get an A level support, there will be an alternate ending where she and one of them get married and have a child together by the name of Wolt.

(Source: Fire Emblem Wiki)