Is Asura the manifestation of Haoshoku Haki?

[SSJ2]

When Kaku first saw Asura he made note that it gave off the feeling of a demonic spirit or something to that effect. With recent developments in Wano, is Asura the manifestation of Haoshoku Haki or is it something separate?

 

[Warmmedown]

I thought it could be a different manifestation of Conq-Haki for a while. Of course Zoro has demonstrated more willpower than anyone in the series, plus when he fought Monet she couldn't move, which is weird for an experienced pirate.

As for what else could be contributing - maybe it's his cursed sword seeping into his soul/will.

 

[Future Warrior]

Too soon to say for sure. I do believe it's a power up spiritual in nature but whether Conquerors Haki is directly involved remains to be seen.