From AO3

General overview of the Jayvik AVATAR AU:

Ambessa Medarda is the head of the RDA while Mel is one of the current frontrunners of the Pandora Conservation Program

Jayce became a chosen candidate to partake in Pandoran studies on Pandora soil because his research paper astounded Professor Heimerdinger (the author of Na'vi biology)

He and Heimerdinger both learn about Pandora's integral system while trying to find opportunities to help human life (lifestyle practices, climate balance, etc) back on Earth

Jayvik is a mutuals -> enemies -> friends -> lovers pipeline LOL

Tìyora’ is Viktor's Na'vi name, which means victory, a win

Ambessa has been meticulously been attacking one forest Na'vi clan that Mel visits frequently to help them learn the English language (Viktor contributes Na'vi in his clan to learn since learning can be considered as something worthwhile)

Viktor was born crippled (but he was able to adapt to it and able to hunt and fly his Ikran) and due to one of Ambessa's attacks, his weak leg also has a explosion scarring

He won't admit to anyone but it actually gives him a hard time having efficiency of living

Jayce was intentionally used as a RDA pawn without him even knowing it, leading to Viktor's clan being attacked the second time

As an apology, Jayce, Mel and Heimerdinger sneakily used RDA money to try to gift Viktor a new bionic leg