Lo and Li

History
These aged twin sisters appear to be Princess Azula's teachers, overseeing her generation of lightning. In "Return To Omashu", the twins advise Azula to abandon the Royal Procession in favor of a smaller elite group to better increase her chances of capturing her fugitive brother.

The twins are later seen in "The Awakening," presiding over a rally held at the Capital city's royal plaza, where they boastfully declare victory over the Earth Kingdom thanks to the efforts of Azula and the newly returned Prince Zuko.