Seven

Seven is the son of the human woman Korra and the inama male Tosun. As such, he is the first inama-human born child and, more than that, being Tosun's son, he possesses royal inama blood.

Korra was killed before giving birth to Seven and the infant was delivered by Akiji. Ever since, Akiji, who's tragically lost his wife, has raised Seven as if he were his own. Together with the AI dog La'Keisha, he has provided Seven with a loving home.

As a half Inama, Seven grows and ages at a vastly accelerated rate. Appearance-wise, his human side and inama blood are balanced out: Seven is smaller than the average inama, very human in his frame and he is less animalistic than the average inama, though he would never be mistaken for a human either.

Except for Akiji and La'Keisha, no one knows of Sevens existence. The very fact that Seven is alive, is proof that the inama virus can be fought and, in fact, unbeknownst to all, Seven's blood is the antidote the virus and thus it has the potential to change life as we know it. The potential to bring about a new age... to end all warfare and bring peace.