Fujin: Farewell Thunder God, I will not fail you. Raiden: That is why I picked you. -- Fujin's Mortal Kombat 4 Ending Fujin is a fictional character in the Mortal Kombat fighting game series. He made his debut in Mortal Kombat Mythologies: Sub-Zero as a boss, and first became playable in Mortal Kombat 4.