Leo D. Haki, previously known as "Observation Haki" is a Super Smash Bros. Ultimate player from the United States who mains Mii Brawler.
He has competed in tournaments like 2GG: Prime Saga, BREAKOUT Spring 2019, ESS SMASHDOWN 4/11, EVO 2019, Genesis 7, IE Battle Arena 6, Mainstage, NorthEast Army Gaming Tournament (Smash Ultimate), Reset: Smash for RAINN, Super Smashed Fest, and Ultimate Nimbus.
Leo D. Haki's gamer tags are a nod to the anime/manga series, One Piece. Follow him on Twitter.