What episode does Haki get introduced?
61 Chapter 597 (p. 12-15) and Episode 516, Rayleigh explains Haki. ↑ One Piece Manga and Anime — Vol. 25 Chapter 234 (p.
Who is the first person to use Haki?
Shanks was, in fact, the first person to use Conqueror’s Haki in One Piece. It is widely speculated that his Conqueror’s Haki is the strongest in the series.