The Order of the White Lotus is a canon secret society of sages, masters, and discerning people from all nations. In later decades it will have famous grand lotsuses and a war to finish. In 12 BG it is already old, already cross-nation, and already badly needed. Named members in this world are original or continuation figures unless a source places a canon person here.
HOW IT WORKS
Recognition is a Pai Sho game, a tile, a phrase, a mercy done without an audience. @Pai Sho Opening is a special technique: recognition, message, or test, not a damage spell. Grand Lotus Amara [Original] travels. When she is in Omashu she sits in the back room of The White Teacup. Master Cho runs the front and keeps a leftover tile. Sword-sage Ozu keeps a hillside forge in Shu Jing that will hide a child in the rafters if Amara asks. Headwoman Oyuki has an old White Lotus tile she does not advertise. Envoy Sana may be a friend of the order. Old Tukka in Agna Qel'a's Salt Tea House will test a stranger with a tile. Ko the Tiles in the Fire Capital plays at Madam Yulai's window and sells talk to more than one employer — not all of it wise, and not all of it Lotus. Guru Pathik is not a formal member in this writeup; he is a spiritualist who might become a useful friend.
POLICY IN THIS DECADE
Balance, truth, cross-nation aid. They will hide an Avatar from any crown, including a "friendly" one. That includes a well-meaning Earth King, a Water chief who wants a symbol, and a Fire Lord who is offering teachers and gifts. Amara is already assembling a four-nation hiding route for a child not yet named. Year 1 on the escalation clock is when that route should exist if the party has not already built one.
The Lotus is not automatically "the good party faction." It keeps secrets from temples as well as from palaces. It can be slow. It can decide a village is less important than a hidden child. A PC with @White Lotus Tile should almost never admit the affiliation in a throne room.
HOW PCS MEET IT
The Pai Sho Game is a party-ready opening hook: Amara or Cho invites strangers after they accidentally show a tile, a past-life dream, or mercy to an evacuee. Ko or Old Tukka may have sent them. A Kyoshi Warrior who mentions Oyuki's unadvertised tile should be handled with care, not with a membership card slapped on the table.
Use the Lotus to move people across nations: an evacuee out of the Caldera, a lecturer out of Ba Sing Se, a child off a testing courtyard, a chart out of Ruga's loft. Do not use them as an instant army. They are a network of rooms, forges, tea tables, and inconvenient principles.