3 guesses why he's called Old Man Genocide 

 

Name: Shigekuni Yamamoto, adopted the name "Genryuusai" sometime after the Gotei's inception
Origin: Bleach
Gender: Male
Classification: Captain Commander of the Gotei 13, Squad 1 Division Captain, Founder of the shinigami academy
Age: Unknown, at least over 2000 years old
Powers and Abilities: Super strengthspeeddurability, endurance, agility, pseudo flight, able to use Kido, Zanjutsu adept (art of the sword), Hakuda practitioner (hand-to-hand combat), Shunpo adept (speed enhancement technique), the ability to use and exert it as Reiatsu (used to increase the user's offensive power and defensive abilities), can sense beings with Reiatsu, the ability to use Shikai and Bankai (upgrades that increase his Reiatsu), can sense beings with Reiatsu | Fire manipulation | Fire manipulation (can burn as hot as the sun), necromancy
Weaknesses: Lost an arm in an attempt to kill Aizen, no longer retains the ruthless edge as a tactician he possessed in his prime
Destructive Capacity: City level | City level+, island level+ w/prep (Ryuujinjakka is stronger than Engetsu) | Island level+, small continent level (with a suicide attack)
Range: Several hundred meters regularly, several hundred kilometers with Bankai
Speed: Massively hypersonic+ with sub-relativistic reactions via powerscaling (able to keep up with Yhwach [the copied version of Royd Lloyd])
Durability: City level+, island level+ damage soak
Lifting Strength: Superhuman, extent unknown
Striking Strength: 
Class PJ+ 
Stamina: Extremely high (weaker characters like Renji can fight for 3 straight days)
Standard Equipment: Zanpakuto
Intelligence: A master of all forms of shinigami combat as well as a battle-hardened veteran with millennia of experience leading the Gotei, evidenced by how he is able to anticipate Aizen's movements ahead of time during the Arrancar war and is perceptive enough to  detect slight oddities in the reports of his subordinates (namely Isshin and Mayuri)
Notable Attacks/Techniques: 

Ryuujin Jakka: This is the name of the Zanpakuto. Its release command is "Reduce All Creation To Ash"

- Shikai (Initial Release): Reduce All Creation To Ash: The second form (or first "upgraded" form) available to a Zanpakutō. To activate it, the Shinigami needs to learn the name of their Zanpakutō. The sealed form the zanpakuto appears as an ordinary wooden staff that can be peeled off at any time, revealing a standard Katana with a purple sheath and hilt. Upon activating Shikai, the blade is engulfed in a constant stream of fire that reduces what they touch to ash. Yamamoto is able to manipulate these flames in various ways, corresponding to the technique used.

  • Jōkaku Enjō (Fortress Blaze): This technique creates an immense wall of flame, which surrounds the target and forms a huge contained sphere of flame in which to imprison enemies. It is immensely powerful, as it was capable of imprisoning three high-level Shinigami (namely Aizen, Gin and Kaname) for a significant amount of time

 

 

  • Taimatsu (Torch):This technique allows Yamamoto to create a great inferno with a simple wave of Ryūjin Jakka. The fire generated by the attack completely consumes whatever is caught within it, until nothing remains but ashes.The flames created by Ryūjin Jakka can be controlled, with great precision, by Yamamoto to attack only the targets he chooses, and he has power over the intensity of the flames.

 

  • Ennetsu Jigoku (Flames of Hell): This ability creates seven or more immense pillars of flame that surrounds an area. The intent of this technique is to trap the opponent in the caged inferno and destroy them. The power of this technique can destroy everyone caught in its vicinity, even Yamamoto himself.

 

 
 


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Bankai (Final Release): Zanka no Tachi (Longsword of The Remnant Flame): The second and final upgraded form of a Zanpakutō. To achieve Bankai, one must be able to materialize and subjugate their Zanpakutō spirit. The power and forms of Shikai and Bankai are dependent on the Zanpakutō. They also vary according to the wielder's strength and training. But in general, one's power can grow 5 to 10 times greater. In Bankai, all external flames released by the shikai retreat into the blade, leaving an ancient and rusty katana scorched by fire. The concept of Zanka no Tachi is to incorporate the full power of Yamamoto's flames and release a tremendous inferno with each swing. Yamamoto is able to excite the flames even further by raising the heat to 15 million degrees; at this stage, the flames no longer disintegrate the target but burn anything it touches out of existence. It should be noted this form of Zanka no Tachi greatly limits the range of the Zanpakuto. 

  • Zanka no Tachi, Higashi: Kyokujitsujin (Longsword of the Remnant Flame, East: Rising Sun Edge): Automatically activated at release, this ability concentrates the intense flames of the sword along the edge of the blade. It neither burns nor erupts, but anything it touches is eradicated to nothingness.

 

 

 

  • Zanka no Tachi, Nishi: Zanjitsu Gokui (Longsword of the Remnant Flame, West: Remnant Sun Prison Garb): Automatically activated at release, this ability is unseen by the eyes of anyone else unless Yamamoto wills it to be seen. It engulfs his body in heat that reaches a temperature upwards of 15,000,000 degrees. Thusly, it becomes impossible to even touch him while he is using his Bankai. The level of heat produced by this technique is such that it wouldn't actually appear in the form of flames.  

 

 

  • Zanka no Tachi, Minami: Kaka Jūmanokushi Daisōjin(Longsword of the Remnant Flame, South: Great Burial Ranks of the Ten Trillion Fire Dead): Yamamoto impales the tip of his sword into the ground, and calls upon the corpses and ashes of the dead who were killed by his flames to come forth and fight on his behalf.They emerge from a rupture in the ground that comes with enough force to decimate the nearby defensive abilities. Using the heat of his sword on their ashes, he can rouse all the people he has killed, allowing the corpses to become his limbs and attack whomever he deems as his enemy until they become dust. He can bring forth any specific corpse that he wishes, allowing him to inflict psychological damage upon those with connections to those he has slain.

 

 
 

 


Zanka no Tachi, Kita: Tenchi Kaijin (Longsword of the Remnant Flame, North: Heaven and Earth End in Ashes)
: A ranged slash of concentrated fire and heat that incinerates whatever it touches out of existence. 

 

 

 

  • Fake Zanka no Tachi: This form seals all of the shikai's flames into blade and releases it in a gigantic burst of flame

 

Zanjutsu (Art of the Sword): The fighting style for the Zanpakutō, (i.e. sword fighting) and is one of the four basic fighting styles of the Shinigami

  • Hitotsume: Nadegiri (The First: Killing Stroke): This basic technique allows for a precision cut of extreme force and speed, which can easily slice through large, multi-story high opponents. The opponent is killed with one swift slash so precise, they aren't even aware of until after it has taken place.

 

  • Onibi (Demon Fire): A technique where Yamamoto takes his Zanpakuto in its sealed staff form and thrusts it at his opponent, creating a large hole in their body.


Hakuda (Hand-to-Hand Combat): A close-combat martial art of fighting in which one is unarmed and uses only ones body, and is one of the four basic fighting styles of the Shinigami.

  • Ikkotsu (Single Bone): A single punch strong enough to blow holes through an arrancar's hierro and send him crashing through city-blocks.

 

  • Sokotsu (Double Bone): A full-out assault using both fists. Yamamoto is able to crush Wonderweiss into tiny fragments by striking him using both arms simultaneously.

 

Shunpo (Flash Step): Superspeed technique which propels the user across short distances at enhanced speeds. The sheer force of Yamamoto's lift-off can destroy buildings.

 

Kidō (Demon Arts): A form of Shinigami combat that is based on advanced spells that are produced with strong Reiryoku and fall into two categories: Hadō (Way of Destruction) for direct attacks, and Bakudō (Way of Binding) for battle support. It is one of the techniques in the Zankensoki, the group of Shinigami primary combat skills. Kidō spells are triggered by an incantation. Experienced users can trigger them without an incantation, though the effectiveness of the spell will be diminished.

 

  • Hado #96: Itto Kaso (single blade cremation):  A sacrificial kido using the arm as a catalyst. The spell takes form as a blade of spirit energy rising upward.


Notable OBD Victories:

- Tao Pai Pai (Dragon Ball) - Tao Pai Pai Profile

Notable OBD Losses:

Don Fua (Battle Angel Alita) - Don Fua Profile

Other:

 

 
 The 13 Captains

 

Key: Base | Shikai | Bankai