Eirika

Princess Eirika is one of the two main characters of the game Fire Emblem: The Sacred Stones which is the 8th title to it's belonging series. She is the lord who appears in the introduction, for the rest of the game it is optional for the player to either take Eirika's route or Ephraim's. Princess Eirika is the third female lord for the Fire Emblem series, and she is the only female lord who can wield only one type of weapon.

The journey begins
Eirika is the daughter of King Fado, and also the twin sister of Prince Ephraim. At the beginning of the story it is shown that Grado invades Renais. Ephraim leaves the castle with his own group of troops, and King Fado commands Seth to take Eirika to Frelia (a neighboring kingdom) so she could be safe. Surprisingly Valter, a ambitious Grado recruit, appears and attacks Seth. However Seth does not die and takes off, with Eirika, more enemies appear and it is here that Eirika proves her strength and both Seth and Eirika work their way out.

Once they get to Frelia Eirika is told of her father's death, so Eirika decides to venture off and help her brother, as well as try to figure out what exactly is going on with Grado as one of her best friends is in fact the son of Grado's king. Frelia's king supports Eirika with some troops as well as money and hopes the best for her. So then Eirika sets off to end all this chaos, and in her way she meets many people who decide to help as well as secrets that make her realize more and more of what Grado is really up to.

Eirika in Brawl?
At this point it is questionable how many playable representatives Fire Emblem will get in Smash Brothers Brawl. However two supporting characters from Eirika's game were shown as stickers. So it could be concluded that the major characters of Fire Emblem: The Sacred Stones will most likely be in Brawl as something.