Spirit isn't haki. Oden's spirit because the soul of the sword user remains even after death, the next user inherits their 'will'.
Strange haki because only Enma imbues Zoro's haki outside of the blade like flame while when Zoro uses the other swords, it's coating but doesn't have the flame.
If it was Oden's haki, it would have just said so.
Strange haki because only Enma imbues Zoro's haki outside of the blade like flame while when Zoro uses the other swords, it's coating but doesn't have the flame.
If it was Oden's haki, it would have just said so.