ok so i'm opening the haki subject with basic principles and personal observations
"Haki" is a power that lies dormant in all the world's creatures... "Presence", "fighting spirit" and "intimidation"... It is not different from the things that humans can naturally sense such as these... 'The act of not doubting'. That is strength! " Silvers Rayleigh"
there are 3 types of haki that were presented so far which are :
-Kenbunshoku Haki, also known as Mantra and it stranslate as observation haki : it allows the user to sense the presence of others, even if they are concealed from view or too far to see naturally and it's not limited to living creatures early on in the manga zoro in his fight vs daz bones a.k.a Mr.One showed signed of observation haki and as a result he made the strike called shishi sonson ,luffy too showed signs of it in his fight vs galdino a.k.a Mr.Three when he could figure out which one was the real one in the midst of candle clones.
the strongest observation haki showed in the anime goes to enel when he could know what's going on in an entire country, he could tell what they were saying and doing and if someone died, gol D.roger seem to surpass all with his understanding the story written in stone just by hearing it's inner voice and even writing letters in a language he didn't understand and couldn't read but there is not enough details to show this.
-Busoshoku Haki also known as armament haki it allows the user to create a force similar to an invisible armor around themselves. Similar to Tekkai that's used by CP9 members, this Haki allows the user to defend against attacks that would otherwise cause them harm. Significant physical force can still overcome this defense.
the basic form is to wrap up a portion of the body with supposetly invisible armor however we've seem several users turning their hand in pitch black when they use it, the most notable advantage of this haki is that's it's the most efficient power to counter the logia-type devil fruit users which seemed like invincible duo to this kind of power again just like observation haki it's not limited to that users like garp and Rayleigh and Sentomaru didn't turn their body parts into black when used and boa hancock broke smoker's jetta when she stricked and the curious part is that the jetta turned into stone before it broke which would imply the black part is the very first step and there is more to it another point worth mentioning when diamond jozu stricked aokiji with hi shoulder, his shoulder was made of diamond and since aokiji took damage from it ,it negates that it was a DF power it's more likely to be armament haki and at last sanji's diable jambe is theorised to be armament type however until we see him in action vs a logia DF user it's still a speculation as Rayleigh said most users tend to develop one kind as his primary power it seem that zorr's haki is observation and sanji is armament.
-Haoshoku Haki also known as conqueror or king's haki is a rare form of Haki that cannot be attained through training. Only one in a million people have this ability,This type of Haki grants the user the ability to dominate the wills of others. The most common usage in the series so far is knocking those with weak wills unconscious Whilst inexperienced users are restricted to merely overpowering the will of one individual or blindly knocking out weak-willed people around them,It was first demonstrated by Shanks, when he used it to scare off a Sea King. Later on, during a meeting with Whitebeard, he used it to knock out most of the crew, which the few still standing attributed to his superior Haki there are various theories that goes hand in hand with this power one of them is that some users were combining both observation and king's haki to pull some amazing feats such as shirahoshi who seemed to use the observation to hear the sea kings and the king's haki to command them however she only did it unconsciously and she turned out to be an ancient weapon call poseidon and concerning dragon who could control weather is theorized to be the ancient weapon uranus check this link for more details http://mangahelpers.com/forum/showth...nkey-D.-Dragon
there is a theory that state :
the ancient weapons with gods names were considered as such just because of their conqueror's haki.
Last edited by Arbalest; July 17, 2014 at 10:38 PM.