Aztec Chief

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Woooooaah! I've finally obtained... eternal life! (おぉお〜ん 我はついに手に入れたぞ!!永遠の命を!, Oooooon... Ware wa tsuini teniireta zo!! Eien no inochi o!)
—Aztec Chief, Chapter 1: Prologue

The Aztec Chief (族長(オサ), Osa, lit. "Chief")[1] is an unnamed tertiary character featured in the opening sequence of the first part of the JoJo's Bizarre Adventure series, Phantom Blood.

The man is the chieftain of an Aztec tribe that flourished in Mexico centuries ago. He is the second character introduced in the entire series, and serves as a prefigure to the power of the Stone Mask.

Although his opening scene is omitted from the anime adaptation, he appears as part of a mural in the ending sequence, Roundabout.


The chief appears as a man of muscular build with long shoulder-length hair. He is only shown wearing the Stone Mask, covering his face. He is shirtless with a leopard-pelt cape and wristbands, a necklace with fangs, and a loincloth.

In the Stardust Crusaders OVA, he wears a Stone Mask with blue feathers on it, wrist wraps, a sleeveless tunic, and a loincloth. He also has a sun marking on each hand.

Color Schemes

The series is known for alternating colors between media, the information presented below may or may not be canon.
Outfit(Gold accessories, Stone Mask)
(Yellow suit, ivory wristbands, Stone Mask, lavender feathers)
Hair(Dark turquoise)
(Leather brown loincloth, silver accessories, yellow wristbands with black spots, Stone Mask)


As the leader of his tribe, he is viewed by his people as proud and powerful. He is shown to be power-hungry, as he declares that he has finally gained eternal life after becoming a vampire. He also seems to be careless in regards to his people, as he slams one of his followers into the ground after draining their life force. His tribe is known to be cannibalistic and to hold sacrificial rituals similar to the one shown.[2]


After obtaining vampiric abilities from the Stone Mask, the chieftain demonstrates being able to drain the life force out of people. In addition, he also demonstrates incredible strength, creating a large crevice from slamming a human into the ground.



The man is the chief of a cannibalistic Aztec tribe that flourished in Mexico around the 12th-16th century.[2] His tribe is known to have done sacrificial rituals.

Phantom Blood

The chief and his tribe

Long before the events of Phantom Blood, the chieftain, wearing a Stone Mask, sacrifices a maiden on an altar as part of a ritual. His mask absorbs her blood and pierces his brain, turning him into a vampire. He proudly announces that he's gained eternal life, and then asks one of his cult members to become one of his life force; the member agrees, and so the chieftain absorbs the member's blood. The rest of the tribe cheers for the chieftain.

It is unknown what happens afterward, as it is stated that he and his tribe disappeared from history, leaving only their ruins, never to be seen again. Nonetheless, the time of his tribe was the earliest known appearance of the Stone Mask.[2]

Chapters / Episodes

Book Icon.png Manga Appearances
Chapters in order of appearance
TV Icon.png Anime Appearances
Episodes in order of appearance


Quote.png Quotes
  • Blood is life! (血は生命なり!, Chi wa inochi nari!)
    —Aztec Chief, Chapter 1: Prologue
  • Woooooaah! I've finally obtained... eternal life! (おぉお〜ん 我はついに手に入れたぞ!!永遠の生命を!, Oooooon... Ware wa tsuini teniireta zo!! Eien no inochi o!)
    —Aztec Chief, Chapter 1: Prologue
  • You! Will you be my life? (汝!わたしの生命となるか!, Nanji! Watashi no inochi to naru ka!)
    —Aztec Chief, Chapter 1: Prologue
  • I can drain his life! And this Stone Mask has given me the power of a true ruler! (生命を吸いとるッ!そして!この石仮面から真の支配者の力を手に入れたぞ!, Inochi o sui toru! Soshite! Kono ishikamen kara shin no shihai-sha no chikara o teniireta zo!)
    —Aztec Chief, Chapter 1: Prologue

Video Games

Phantom Blood (PS2)

The Aztec Chief is playable in the Phantom Blood PS2 game in Extra Battle Mode, where he must defeat 15 Aztecs at the sacrificial altar. His special attacks utilize the knife he wields.

PS2 Aztec Chief Render.png
Aztec Chief
PS Square.pngPS Square.pngPS Square.pngPS Square.pngPS Square.png
Normal Combo
PS Triangle.png
Become My Life!
PS Square.pngPS Triangle.png
Worship the Stone Mask!
PS Square.pngPS Square.pngPS Triangle.png
Honor the Chief!
PS Square.pngPS Square.pngPS Square.pngPS Triangle.png
Reap Life!
PS Square.pngPS Square.pngPS Square.pngPS Square.pngPS Triangle.png
The Power of a True Ruler
Running PS Square.png
Aztec Food Chain
Running PS Triangle.png
Receive It!
PS Circle.png
Back Step
PS Circle.png during damage
Mega Crush
PS R1.png (LV0-3)
Blood is Life!

Available Stages: Extra Battle 13

All-Star Battle (PS3)

The Aztec Chief appears as a Campaign Support Character in All-Star Battle with his mask granting the player an increase in strength and defense.

All-Star Battle R (Various)

Unlock Condition: Unlocked by default
Stone mask powa.gif

A mask used in sacrificial Aztec ceremonies.[2] When touched by blood, it shoots out a mass of bone spicules that stimulate the victim's brain, causing a vampiric transformation.

A mask used in sacrificial Aztec ceremonies. When touched by blood, it shoots out a mass of bone spicules that stimulate the victim's brain, causing a vampiric transformation.

ASBR support char 12.png

The Aztec Chief returns from All-Star Battle in All-Star Battle R to appear as a Support Effect (サポート効果, Sapōto Kōka) titled The Mysterious Stone Mask (神秘の石仮面, Shinpi no Ishi Kamen), costing ASBR Coins.png 900G, and increasing the attack and defense of the player who applies it.

The panel used for the Support Effect's image is from the Aztec Tribe's sacrifice of a young woman for the Stone Mask.[2]



  1. 1.0 1.1 JoJo 6251
  2. 2.0 2.1 2.2 2.3 2.4 2.5 2.6 2.7 Chapter 1: Prologue

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