The dossier
Ten years old and nobody's subordinate
Lyanna Mormont became Lady of Bear Island when her mother Maege died north of the Wall. She was ten years old. She runs the house and answers royal correspondence with complete authority. Visiting claimants leave when their arguments fail to persuade her.
Jon Snow and Sansa Stark arrive at Bear Island seeking support against the Boltons. Lyanna makes them earn her support. She questions whether House Mormont should risk its soldiers on an unproven cause.
Bella Ramsey plays Lyanna without adjusting for age. The character does not look to adults for cues or permission. That absence of deference defines every scene. Ramsey holds it steady regardless of what the opposite actor does.
Lyanna Mormont appeared in nine episodes across three seasons and became one of the series' most recognisable supporting figures. Her final battle places her physical size against an undead giant. Its outcome follows the defiance established in her first scene.