Either Iroh or his sister. They could have finally developed the character of Izumi's daughter, because they just threw in some commentary that she exists and that's it.
KendixPL, I attribute this to Mike and Bryan's attempts to keep TLOK more focused on the central plot and mentioned some stuff that stayed on the cutting room floor.
I think it's got potential to be further explored later as the franchise moves on.
@Immediate need First, the current Fire Lord is Izumi. Second, UnchainedDragon25 was referring to General Iroh, Izumi's son, Zuko's grandson, named after Iroh, Zuko's uncle.
