Corri of the Blue Sky

Unarmored Defense. Corri adds her Constitution modifier to her armor class.

Firbolg Magic. Corri can cast detect magic and disguise self once per day each.

Freedom of the Wind. Corri has advantage on saving throws against being paralyzed or restrained. Additionally, she can cast the longstrider once per day.

Investiture of Sea and Sky. Difficult terrain made of water does not impede Corri's movement, and if she is standing on a watery surface at the end of her turn and has fewer than half her hit points remaining, she heals 1d4 hit points. In addition, while raging she has a flying speed equal to half her walking speed rounded down. 

Chain-Breaker. While raging, Corri's movement speed cannot be reduced, and when she enters a rage she can choose up to three friendly creatures within 30 ft. of her, including herself, and increase their walking speed by 10 ft. until her rage ends.

Multiattack. Corri makes one attack with her Battle axe and one attack with her War axe

Harbinger's Battle axe. Melee Weapon Attack: +12 to hit, reach 5 ft., 1 target. Hit: 13 (1d10 + 6) slashing damage and 5 (1d8) cold damage. 

Pathfinder's War axe. Melee Weapon Attack: +12 to hit, reach 5 ft., 1 target. Hit: 10 (1d8 + 6) slashing damage and 2 (1d4) bludgeoning damage.

Rage (5/day). As a bonus action, Corri can enter a rage,  granting her advantage on all Strength checks and saving throws, granting her a + 3 to all her melee attack damage, and granting her resistance to non-magical piercing, slashing, and bludgeoning damage. If she does not attack anything on her turn while raging, her rage ends.

Tidal Fury (6/day). Corri's next melee attack is empowered, granting it an extra 2d8 bludgeoning damage on a hit, as well as forcing the target to make a DC 18 strength saving throw or be knocked prone.