Jago is a Tibetan monk, following the Tiger Spirit (which becomes Gargos in Killer Instinct 2), who is on a path of enlightenment to defeat the evil within him.
He believes it is his destiny to destroy Ultratech.
In the sequel, Jago succeeded in destroying Fulgore in the first tournament after being possessed by the Tiger Spirit.
He was soon betrayed by the latter, which turned out to be the demon Gargos in disguise.
Gargos used Jago to gain entrance to the physical world, and Jago seeks revenge for Gargos' manipulation.
It is revealed at the end of the game that Orchid is his sister; they were orphaned and separated at birth.
In the third game, Jago is suffering a crisis of faith following the discovery that the Tiger Spirit was Gargos all along, and hopes to purge the last remnants of Gargos within him in battle.
This crisis of faith is symbolized through his new costume, which consists of various materials cannibalized from the now abandoned Tiger Shrine, including tiles (arm guards), bits of broken statues (knee pads), drapery, and ropes from a chandelier (leg bindings and harness).