Elice

Elice is the daughter of Cornelius and Liza and the older sister of Marth. When the Dolhr Empire attacks Altea, she chooses to stay with the Altean people and sends Marth and later Malledus away so that they can survive. Ultimately, she is captured by Gharnef, who wants to use her to gain access to the Aum Staff. After Gharnef is finally defeated, Marth frees her and she joins the Altean army.

Elice is a calm and composed woman who cares deeply for her younger brother Marth and both of her parents Liza and Cornelius.

(Source: Fire Emblem Wiki)