As we know, CoC is tied to willpower. Willpower can subsequently be tied to strong emotions. Therefore by manipulating one's emotions, it should in theory be possible to boost one's haki.
I feel like this is a very real thing in one piece and something we have seen from several of the yonko.
The best example we have of this is Kaido's drunk mode, which was implied to make his haki stronger, as per Luffy's comment. By getting drunk and forcing himself into extreme emotional states, Kaido boosted his haki.
Next we have Big Mom. BM, in her mothering mode, showed a better haki feat than she arguably did against Kid and Law, using a barrier to KO Page One. Given how BM was pregnant year after year until recently, is it not possible that by getting pregnant, BM was able to constantly be in mothering mode, allowing her to spam ACoC?
This would explain her impressive bounty and the fact that Roger avoided fighting her, while Shanks casually out damaged her by one shotting Kid. Evidently, she was much stronger in the past. Her pregnancy and mothering mode as a result could have possibly been the key.
Then you have Shanks. Shanks surrounds himself with a useless army of fodder. While Luffy has an impressive grand fleet with powerful captains like Bartolomeo, Cavendish, and Sai, Shanks has frog man, a geezer, and a princess.
Because these captains can't fend for themselves, they are easily endangered by strong adversaries. This forces Shanks's hand to eliminate said threats swiftly and effectively, as seen with Kid.
The thing Oda has always hyped about Shanks is his crew. When GB ran from Shanks, he didn't mention Shanks by name, he mentioned the RHP.
And in 1079 when Shanks took out Kid, the chapter also referenced Shanks's crew.
Could the RHP be a sort of haki booster for Shanks? I feel like its not impossible. Perhaps that is his weakness, to face Shanks when his crew isn't present. When he has nobody to defend but himself.
Moving on, you have Luffy. I think there are two big things that boost Luffy's haki.
Then you have G5. As I mentioned, CoC comes from willpower, of which emotion is a major part of. G5 changes Luffy's emotions, making him feel intense joy. This clearly has some effect on his haki as you can see Luffy's haki surging as he awakens G5. Subsequently, while they clashed throughout their fight, there was only one time in the entire battle when Luffy overpowered Kaido.
That was when Luffy was in G5.
I believe that G5, by boosting Luffy's emotions, offers Luffy a haki boost. This is why the gorosei feared the Nika fruit so much. I theorize that the gorosei and Imu all have DFs with comparable effects. DFs that boost emotions and haki as a result. These emotions could be:
haki boosters for other characters:
I feel like this is a very real thing in one piece and something we have seen from several of the yonko.
The best example we have of this is Kaido's drunk mode, which was implied to make his haki stronger, as per Luffy's comment. By getting drunk and forcing himself into extreme emotional states, Kaido boosted his haki.
Next we have Big Mom. BM, in her mothering mode, showed a better haki feat than she arguably did against Kid and Law, using a barrier to KO Page One. Given how BM was pregnant year after year until recently, is it not possible that by getting pregnant, BM was able to constantly be in mothering mode, allowing her to spam ACoC?
This would explain her impressive bounty and the fact that Roger avoided fighting her, while Shanks casually out damaged her by one shotting Kid. Evidently, she was much stronger in the past. Her pregnancy and mothering mode as a result could have possibly been the key.
Then you have Shanks. Shanks surrounds himself with a useless army of fodder. While Luffy has an impressive grand fleet with powerful captains like Bartolomeo, Cavendish, and Sai, Shanks has frog man, a geezer, and a princess.
Because these captains can't fend for themselves, they are easily endangered by strong adversaries. This forces Shanks's hand to eliminate said threats swiftly and effectively, as seen with Kid.
Could the RHP be a sort of haki booster for Shanks? I feel like its not impossible. Perhaps that is his weakness, to face Shanks when his crew isn't present. When he has nobody to defend but himself.
Moving on, you have Luffy. I think there are two big things that boost Luffy's haki.
- defeats
- Nika powers
Then you have G5. As I mentioned, CoC comes from willpower, of which emotion is a major part of. G5 changes Luffy's emotions, making him feel intense joy. This clearly has some effect on his haki as you can see Luffy's haki surging as he awakens G5. Subsequently, while they clashed throughout their fight, there was only one time in the entire battle when Luffy overpowered Kaido.
That was when Luffy was in G5.
I believe that G5, by boosting Luffy's emotions, offers Luffy a haki boost. This is why the gorosei feared the Nika fruit so much. I theorize that the gorosei and Imu all have DFs with comparable effects. DFs that boost emotions and haki as a result. These emotions could be:
- Anger
- fear
- sadness
- greed
- lust
haki boosters for other characters:
- Zoro/Mihawk - pain
- Sanji - passion
- Koby/Sengoku - tranquility/Samadhi
- Garp - joy
- Sabo - sadness
- Akainu - rage