Nephenee, from Fire Emblem: Path of Radiance.

The series' first playable member of the Soldier class (since the games came to America), and easily the second best character in the game (second only to Ike, who is probably the single most overpowered character a Fire Emblem game has ever had). She has excellent max stats once she is promoted to Halberdier, and a really sweet stat growth that has a tendency to give her boosts to pretty much everything most level ups. She also has access to the Flame Lance (and better Magic growth than most lance-users), making her one of the few characters who can reliably deal both physical and magical damage. And she looks awesome.