Rosalie Roseguard

Rosalie is a tall beautiful female captain with azure hair. She appears to be around twenty years old. She is an impulsive and brash tomboy. She believes she should be on the front lines despite being the kingdom's successor as it was what her father, whom she greatly admires as the world's greatest warrior, also did. She is often compared to a dog, much to her chagrin.

(Source: Cautious Hero Wikia)