Why no one else used Conqueror's Haki?


In Marineford, there were other people than Luffy who had Conqueror's Haki
(Whitebeard, Hancock, etc.). Why didn't they use it when Ace was about to get
beheaded? Because if Luffy did not use it unknowingly, Ace would have died
sooner. Or was it the case that no one had Conqueror's Haki as powerful as
Luffy's which could act at a large distance?




Yes, there are other people who could use Conqueror's Haki at that moment. On
rescue team, they're Shirohige and Hancock. But only Shirohige knows about
Ace's situation and Hancock was fighting somewhere else. However, Shirohige
wasn't in good condition to use Conqueror's Haki. He was sick and badly
injured by some attack by Marine just before Ace's execution order.

![](https://i.stack.imgur.com/zRyHX.jpg)

Some other source said Conqueror's Haki needs heart to use it and Shirohige
couldn't use Conqueror's Haki because his heart was injured. But at this
point, I can't find any canon source to endorse the statement.




Yes, there are other people who could use Conqueror's Haki at that moment. On
rescue team, they're Shirohige and Hancock. But only Shirohige knows about
Ace's situation and Hancock was fighting somewhere else. However, Shirohige
wasn't in good condition to use Conqueror's Haki. He was sick and badly
injured by some attack by Marine just before Ace's execution order.

![](https://i.stack.imgur.com/zRyHX.jpg)

Some other source said Conqueror's Haki needs heart to use it and Shirohige
couldn't use Conqueror's Haki because his heart was injured. But at this
point, I can't find any canon source to endorse the statement.

