Charlotte

Charlotte was born in the capital of Nohr, Windmire, and grew up a pauper. Her childhood was more difficult than some due to her parents both being very poor, but they looked after her to the best of their ability.

Charlotte eventually found herself as a member of the Royal Guard, where the pay was high and as gratitude to her parents she sent them part of her pay. However, as Charlotte feared that showing her true personality would cause problems, she used her innocent side while on the job. This resulted in her being deemed unsuitable for a Royal Guard, and as such was demoted to a border guard, where she met Benny. Though disappointed with the lower pay that came with her new position, she still continued to send part of her pay to her parents.

She is the strongest fighter in the army.

(Source: Fire Emblem Wiki)