- Age: 20
- Height: A head taller than most, as tall as Sawyer.
- Eyes: Blue
- Hair: Spiky light blond hair
- Species: Human
- Other Physical Descriptions: Massive, muscular as Dain. Prominent nose. A singular dimple when he smiles.
- Skills: Top cadet of Violet’s year, combat, athleticism, wood whittling, sign language,
- Personality: Nice, courteous, funny, helpful, friendly, flirtatious,
- Family Members: Liam had a mother and father who died during the end of the Tyrrish Rebellion. His father is Colonel Isaac Mairi, who wasn’t part of the rebellion, but was executed in the family home regardless. His mother was apparently the one who broke ties with Navarre, and was executed during the Calldyr executions. Liam has a little sister, Sloane, who isn’t introduced until Iron Flame.
- Relationships: Liam hooks up with an unnamed first-year after Threshing. Liam is good friends with Xaden since they were fostered together after their parents were killed after the Tyrrish Rebellion. Xaden taught him how to fight.
- Rank: Rider; First-year, Second Squad, Tail Section, Fourth Wing. Earned Gauntlet patch for having fastest time. Moved by Xaden to Second Squad, Flame Section, Fourth Wing in order to protect Violet.
- Dragon Bonds: Deigh.
- Signet(s):
- Relics: Rebellion relic beginning at his wrist.
- Death:
- Quotes:
- “‘I’ve seen your practicing this week with those blades of yours, Sorrengail. Riorson was right. You would have been wasted as a scribe” (Yarros 251).
Xaden taught Liam how to fight when they were being raised as foster children at Duke Lindell’s house in Tirvainne.