Lineages are the clan layer of this world. They are not all bloodlines. A lineage is a family, a temple, a school, or a training tradition that leaves a mark you can @ at the start of play. Two people from the same nation can feel completely different because of this layer.
FIRE NATION LINEAGES
Caldera Noble House — @Noble Bearing. Court manners, invitations, and a dangerous proximity to Sozin. Original house names are fine; the court culture is canon.
Fire Sage line — @Sage's Vigil. Ritual fire, calendars, and a loyalty already splitting between the Avatar and the Fire Lord.
Imperial Army tradition — @Parade Discipline. Formations, logistics, official firebending drills. Many honest people live here.
Sun Warrior descent — @Dancing Dragon Heritage. Rare. Fluid, life-affirming fire. Hunted if exposed during dragon hunts. The Sun Warriors themselves are a hidden people, not a costume.
Lambak spirit-metal clan — @Spirit Vein. Familiarity with unusual ore and island spirits. Canon island; particular families may be original.
Colonial house — @Two-Nation Tongue. Bilingual, politically exposed, useful and suspected in Yu Dao and other colonies.
Yuyan trainee line — @Needleshot Eye. Extreme-range archery. The later Yuyan Archers are famous in the war; Uzuku Yuyan is of Roku's era, and the school is rising now.
EARTH KINGDOM LINEAGES
Ba Sing Se Inner Ring family — @Ring Manners. Etiquette, blindness to the Lower Ring, Dai Li proximity.
Dai Li candidate line — @Stone Glove Training. Rock gloves, silence, 'cultural protection.' The order was founded by Kyoshi. Invitation is not a compliment.
Earth Sage remnant — @Silenced Teaching. Hidden scholarship after the Night of Silenced Sages. Surviving lines are original; the purge is canon.
Omashu mason-chute tradition — @Chute Sense. Urban earthbending and delivery-system work.
Kyoshi Warrior school — @Warrior's Fan. Fans, makeup, swords, discipline; usually nonbenders.
Si Wong sand-sail kin — @Sand-Sail. Sandbending travel and desert navigation.
WATER LINEAGES
Northern warrior caste — @Ice Gate Guard. Formal martial waterbending, canal and gate work.
Northern healing line — @Healer's Hands. Water can already be used to heal in this age. Later-war gender customs need not be enforced as dogma unless the table wants that tension.
Southern hunter-seafarer house — @Open-Water Kin. Boats, hunting, weather-reading.
Foggy Swamp root-line — @Vine-Sense. Plantbending and spirit-talk.
AIR LINEAGES
Southern, Northern, Eastern, or Western Air Temple — @Southern Wind, @Northern Wind, @Eastern Wind, or @Western Wind. Each temple has a flavor: the South under Gyatso mixes humor and rigor; the North watches the Passage; the East sits near restless mountains; the West is inverted, private, and easy to miss.
Guiding Wind adherent — @Unbound Vow. Rejects cozy ties to nobility. Canon movement from era sources.
CROSS-NATION
Spirit-touched — @Spirit Mark. Dreams, spirit attraction, danger from Koh and others. Original category.
Chi-blocker tradition — @Precise Strike. Secret pressure-point art. Original as a formal school; the art is canon later.
White Lotus household — @White Lotus Tile. Pai Sho codes, cross-nation loyalty. Almost never admitted. The Order is canon; particular households are original.
When two lineages could apply, pick one as your origin feat-adjacent identity and treat the other as a contact or a secret. @ only the passives you actually have.