

Ace was the 2nd division commander of the Whitebeard crew, but he hadn't
displayed power befitting of his title. Besides the fact that he was a Logia
user with the power to control fire from Mera-Mera No Mi, he has not
demonstrated any other type of powers like Haki.

For example:

  * In the Alabasta Arc, he fought against Smoker, but he wasn't able to put up a good fight, claiming that both were Logia users and the fight would end with no result.

This also raises questions about Smoker's Haki abilities and the fact that
even Smoker wasn't able to use Haki at that time.

  * He wasn't able to hit Blackbeard when Blackbeard used his Logia power.
  * He showed no resistance when Akainu hit him, not even weak Haki, and took the hit head-on. 

He never fought Logia users with Haki, nor has he shown remarkable Kenbunshoku
Haki.

Haki was revealed after the time skip, but it has been there since Rayleigh's
and Roger's times. Were Ace's abilities limited to his Devil Fruit power only?


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question
one-piece
Did Ace master any Haki abilities?


Yes, Ace had possessed Haoshoku Haki.

According to [Portgas D.
Ace](http://onepiece.wikia.com/wiki/Portgas_D._Ace#Haki) article on One Piece
Wiki:

> While not portrayed in the main storyline, it was revealed in a flashback
> that Ace possesses Haoshoku Haki, which at the time he had no conscious
> control over. Ace first demonstrated the ability at 10 years of age, when he
> knocked the Bluejam Pirates crew unconscious after an outburst of rage (only
> Bluejam himself remained conscious from the Haki release, and he was a high-
> tier of East Blue at the time). Much as Luffy used his Haki to knock out a
> crowd of Kuja warriors, Ace used his Haki to knock out the attacking members
> of Bluejam's pirate crew.
>
> Ace was first shown to have knowledge about it when during the Battle in
> Marineford, he witnessed Luffy unknowingly unleash his Haki and remarked
> "You too?". He has never been seen using Haki apart from during his
> childhood.

Ace unleashed Haoshoku Haki in chapter 587...

![Using Haki](https://i.stack.imgur.com/a1Eba.png)

... and Bluejam's pirate crew after they are hit by Ace's Haki.

![After using haki](https://i.stack.imgur.com/yF3qZ.png)

He might have developed and mastered other types of Haki too, but they are not
shown in the manga. After all, he was the 2nd division commander of the
Whitebeard Pirates and had the power of D.


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answer