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Kain R. Heinlein (カイン・Rアル・ハインライン) is a character in the Fatal Fury series.

While he is the final boss of Garou: Mark of the Wolves, he will only fight players who've attained at least an AAA-ranking win average throughout the game and never lose a single round.

He is voiced by Jun Hashimoto.


Kain is calm, careful, strong-willed and a serious man; he is also very ambitious, but not a megalomaniac. His antagonism stems from being a crime boss to impose his moral ideals, the value of life and living it, and not anything near greed, evil or control, as his brother-in-law Geese would. Both men are ruthless against adversary, shares a strict moral code and respects worthy opponents. He hates emotions as, according to him, they breed conniving and bias.

These characteristics make him more of an anti-villain than a true villain, having noble intent over his supposed evil deeds.


  • Pyrokinesis - Kain can create and control a blue-colored fire.
    • Create Fire - Kain can create blue fire from thin air.
    • Fiery Projectile - Kain can fire up to two projectiles of fire at a time.
    • Fiery Attacks - Kain deliver punches and kicks of fire.
    • Fiery Body - Kain can engulf himself in blue fire.
  • Sense - Kain can sense people nearby through their ki.
  • Energy Attacks - Kain can infuse his attacks with ki energy.
  • Energy Projectiles - Kain can fire two types of energy projectiles: a ball that he fires from his hands and one that comes down from the sky.


  • Visual Empathy - Kain can tell a person's emotions from looking at one person's eyes.

Fighting Style

His fighting style, while not flamboyant or exceptional, is considered effective as he is methodical when using his techniques. He uses some acrobatic moves, and he relies very much on his powers. In terms of gameplay, he is a charger.

Music Themes

  • Dignity Palace - Garou: Mark of the Wolves





  • Kain and Grant (Abel Cameron), while not brothers, were inspired by the Biblical Cain, from the Book of Genesis.
  • All of Kain's moves are written in the German language, hinting that Kain and Marie is originally from Germany or are of German descent.
  • Because of his blue-purple flames, he is often compared to Iori Yagami or anyone of the Hakkesshu, particularly Orochi Chris. His flames comes from his own innate skills and is not powered by any external influences or sources.



Card Fighters Clash DS KOF X Fatal Fury KOF X Fatal Fury KOF X Fatal Fury


Garou: Mark of the Wolves Garou: Mark of the Wolves (Alternate Colors)

Fatal Fury characters
Fatal Fury - King of Fighters Logo Sprite.gif Terry BogardAndy BogardJoe HigashiRichard MeyerMichael MaxDuck KingTung Fu RueHwa JaiRaidenBilly KaneGeese Howard
Fatal Fury 2 Logo Sprite.gif Kim KaphwanMai ShiranuiCheng SinzanJubei YamadaBig BearAxel HawkLaurence BloodWolfgang Krauser
Fatal Fury Special Logo Sprite.gif Ryo Sakazaki
Fatal Fury 3 - Road to the Final Victory Logo Sprite.gif Blue MaryBob WilsonFranco BashHon-FuSokaku MochizukiRyuji YamazakiJin ChonreiJin Chonshu
Real Bout Fatal Fury Special Logo Sprite.gif Nightmare GeeseShadow AndyEX Blue MaryEX Billy KaneEX Tung Fu RueIori Yagami
Real Bout Garou Densetsu Special Dominated Mind White
Real Bout Fatal Fury 2 - The Newcomers Logo Sprite.gif Rick StrowdLi XiangfeiAlfred
Fatal Fury - First Contact.gif Lao
Fatal Fury - Wild Ambition Logo.png Touji SakataTsugumi SendoMr. Karate II
Garou - Mark of the Wolves Logo Sprite.gif Rock HowardB. JenetKim Dong HwanKim Jae HoonHotaru FutabaGatoTizoc (The Griffon)Marco RodriguesHokutomaruKevin RianFreemanGrantKain R. Heinlein