Jill Fizzart (ジルフィザット Jiru Fizatto) is a young Daein girl and the daughter of the famed Wyvern Lord, general Shiharam. She aspires to also become a Wyvern Lord like her father, and is a Wyvern Rider when Ike first meet her. She was a subordinate of captain Haar when she was in the Daein army and was raised in the remote Talrega region of Daein. She allies with Ike when she sees the latter's ship under attack from Kilvas Ravens; after seeing Lethe and Mordecai in action, she begins to question what she was taught as a child, ultimately joining Ike's army, where she becomes close friends with Mist and Lethe.
At the first glance, Jill is very standoffish and usually avoids contacts with most other people, but majorly because she thought they'd hate her, being the sole Daein army rep in the Greil Mercenaries. After the supports with either Mist or Lethe, she starts socializing more with the mercenaries.