Guest Stars Matthew Yang King voices Appa Matthew Yang King voices Momo Ruy Iskandar as Lieutenant Jee Elizabeth Yu as Azula Lim Kay Siu as Gyatso Amber Midthunder voices Princess Yue Momona Tamada as Ty Lee Casey Camp-Horinek as Gran Gran Thalia Tran as Mai Arden Cho as June George Takei voices Koh Randall Duk Kim voices Wan Shi Tong Co Starring Ash Lee as Shufen Thomas Hum as Crew Member Ciara Mandel as Lian Kimmy Choi as Yuyan Archer Captain Rainbow Dickerson as Kya Trevor Carroll as Bato Winson Won as Muki Simon Chin as Yang Rohain Arora as Patron Joel Montgrand as Hakoda Jon Wei Jun Foh as Scruffy Thug Elijah Chenoweth as Teen Olivia Kate Iatridis as Ummi Mela Pietropaolo as Young Girl Meadow Kingfisher as Young Katara Derek Kwan as Patron Tristan Liu as Trainer Tom Lim as Yon Rha Jayson Li as Angry Man Jerry Yang as Crew Member