These are the characters that have appeared in the show. I have the actual debuts, if they made a cameo or flashback before their actual debut. Their titles are in italics, ex. Avatar Roku. If I missed anyone, please inform me. Thank You.
Air Nomads
Avatar Aang (The Boy in the Iceberg)
Appa (The Boy in the Iceberg)
Momo (The Southern Air Temple)
Monk Gyatso [flashback] (The Southern Air Temple)
Ginju [flashback] (The Storm)
Lio [flashback] (Appa’s Lost Days)
Afiko "the Betrayer" (Trading Card Game)
Malu "the Ghost Witch" (Trading Card Game)
Avatar Yangchen (Escape from the Spirit World)
Water Tribes
Gran Gran/Kana (The Boy in the Iceberg)
Katara (The Boy in the Iceberg)
Sokka (The Boy in the Iceberg)
Bato (Bato of the Water Tribe)
Master Pakku (The Waterbending Master)
Chief Arnook (The Waterbending Master)
Princess Yue (The Waterbending Master)
Hahn (The Siege of the North, Part 1)
Hue (The Swamp)
Tho (The Swamp)
Due (The Swamp)
Hakoda (Appa‘s Lost Days)
Kinto "the Waterbender" (Trading Card Game)
Master Wei (Video Game)
Hiryu (Video Game)
Avatar Kuruk (Escape from the Spirit World)
Earth Kingdom
Suki (The Warriors of Kyoshi)
Koko (The Warriors of Kyoshi)
Oyaji (The Warriors of Kyoshi)
Kyoshi Warriors (The Warriors of Kyoshi)
King Bumi (The King of Omashu)
Flopsie (The King of Omashu)
Cabbage Man (The King of Omashu)
Haru (Imprisoned)
Tyro (Imprisoned)
The Pirates of the Earth Kingdom Waters (The Waterbending Scroll)
Jet (Jet)
Smellerbee (Jet)
Sneers (Jet)
Pipsqueak (Jet)
Longshot (Jet)
The Duke (Jet)
The Gan Jin Tribe (The Great Divide)
The Zhang Tribe (The Great Divide)
Canyon Guide (The Great Divide)
Way Jin [flashback] (The Great Divide)
Jin Way [flashback] (The Great Divide)
Herbalist Lady (The Blue Spirit)
Myuki (The Blue Spirit)
Meng (The Fortuneteller)
Aunt Wu (The Fortuneteller)
Jun (Bato of the Water Tribe)
Shirshu (Bato of the Water Tribe)
Mechanist (The Northern Air Temple)
Teo (The Northern Air Temple)
General Fong (The Avatar State)
Song (The Cave of Two Lovers)
Chong (The Cave of Two Lovers)
Lily (The Cave of Two Lovers)
Moku (The Cave of Two Lovers)
Oma [flashback] (The Cave of Two Lovers)
Shu [flashback] (The Cave of Two Lovers)
Yung (Return to Omashu)
Chin the Conqueror [Flashback] (Avatar Day)
Avatar Kyoshi (Avatar Day)
Toph Bei Fong /The Blind Bandit (The Blind Bandit)
Master Yu (The Blind Bandit)
Xin Fu (The Blind Bandit)
The Boulder (The Blind Bandit)
The Big Bad Hippo (The Blind Bandit)
The Gecko (The Blind Bandit)
The Gopher (The Blind Bandit)
Fire Nation Man (The Blind Bandit)
Lao Bei Fong (The Blind Bandit)
Poppy Bei Fong (The Blind Bandit)
Sela (Zuko Alone)
Gansu (Zuko Alone)
Lee (Zuko Alone)
Gow (Zuko Alone)
Than (Zuko Alone)
Ying (Zuko Alone)
Professor Zei (The Library)
Ghashiun (The Desert)
Sha-Mo (The Desert)
Hammi Tribe [mentioned] (The Desert)
Hope (The Serpent‘s Pass)
General Sung (The Drill)
Terra Team (The Drill)
Joo Dee (City of Walls and Secrets)
Dai Li (City of Walls and Secrets)
Pao (City of Walls and Secrets)
Long Feng (City of Walls and Secrets)
Bosco (City of Walls and Secrets)
Star (The Tales of Ba Sing Se)
Jin (The Tales of Ba Sing Se)
Guru Patnik (Appa’s Lost Days)
Earth King Kuei (The Earth King)
Jojo "the Kising Bandit" (Trading Card Game)
The Sage/Ancestral Bear (Video Game)
Consul (Video Game)
Jedd (Video Game)
The Maker (Video Game)
Fire Nation
Prince Zuko (The Boy in the Iceberg)
Uncle/General Iroh (The Boy in the Iceberg)
Commander/Admiral Zhao (The Southern Air Temple)
The Warden (Imprisoned)
Shyu (Avatar Roku)
Avatar Roku (Avatar Roku)
Fire Lord Sozin [mentioned] (Avatar Roku)
Lieutenant/Captain Jee (The Storm)
The Blue Spirit (The Blue Spirit)
Colonel Shinu (The Blue Spirit)
War Minister Qin (The Northern Air Temple)
Jeong Jeong (The Deserter)
Chey (The Deserter)
Fire Lord Ozai (The Siege of the North, Part 2)
Princess Azula (The Siege of the North, Part 2)
Tom-Tom (Return to Omashu)
Mai (Return to Omashu)
Chang [mentioned] (Return to Omashu)
Ty Lee (Return to Omashu)
The Rough Rhinos (Avatar Day)
Colonel Mongke (Avatar Day)
Kachee (Avatar Day)
Ogedei (Avatar Day)
Yeh-Lu (Avatar Day)
Vachir (Avatar Day)
Fire Lord Azulon [flashback] (Zuko Alone)
Ursa [flashback] (Zuko Alone)
Fire Lady Irah [mentioned] (Zuko Alone)
Lu Ten [flashback] (Bitter Work)
Spirit World
Hei Bai (The Spirit World)
Koh the Face-stealer (The Siege of the North, Part 1)
Enma (The Siege of the North, Part 1)
Yue the Moon Spirit (The Siege of the North, Part 2)
Twi (The Siege of the North, Part 1)
La (The Siege of the North, Part 1)
Wan Shi Tong (The Library)
Knowledge Seekers (The Library)
Cabbage Man Appearances
King of Omashu
The Waterbending Scroll
The Serpent’s Pass
The Tales of Ba Sing Se
Edited 37 total times.
