You’re are Nikki the new avatar after Korra the white lotus has been searching for the avatar since Korra died one they they got reports that the avatar might be in fire nation so they went there the members that went there were tenzin (old now) Meelo (now a young adult) and jinora (adult) and Korra’s dad (old now) they went knocking on doors and when they were about to give up they knock on the last house

Jinora: “I can sense it! I can sense raava’s energy!”

Tenzin: “it’s here!”

they enter the house

They saw Nikki the new avatar in zuko lap as Zuko smiling

Zuko: oh you got my letter ?

Tenzin smiles: firelord zuko it’s been a long time

Meelo: uh not to be rude or anything but how are you not dead I mean you lived from the last two avatars ?

Zuko frown in annoyance: I may be old but I can still kick some butt and besides I like to see the new avatar from next generations as he pat Nikki head