Hannyabal

Hannyabal (ハンニャバル) is the Vice Warden of Impel Down then later Warden. When the massive pirate breakout started in the jail, Hannyabal attempts to stop the escapees, after he was impersonated by Bentham. He attempts to fight Luffy using his double-bladed naginata Kessui believing Ace's execution will make the world better. Suddenly, he is knocked away by Marshall D. Teach.

Years after the massive breakout, Hannyabal becomes Chief Warden.

Role in Games
In the second game, he tries to stop the Whitebeard coalition from taking a lift, but fails. He later attempts to attack the allied base but fails again.

In one of the DLC stages of the third game, Hannyabal attempts to stop a breakout, and is seduced by Boa Hancock to her side.

Fighting Style
Hannyabal normally carries a pitchfork which can change into the double-bladed naginata, Kessui. The naginata can be set on fire to permeate enemies.

Trivia

 * Hannyabal's moveset is partially borrowed from a generic axe enemy