Swedish professional gamer also known as Leffen who has come to be known as one of the world's top players of the Super Smash Bros. series of fighting games. He is the Victor of tournaments like Republic of Fighters 3, B.E.A.S.T. 5 and Community Effort Orlando 2015.
He got his start playing Super Smash Bros. Brawl in 2009. He transitioned to Super Smash Bros. Melee two years later.
He has earned more than 90,000 followers on his lffn Twitch account.
His mother is Swedish and his father is Korean-Swedish.
He and Jason Zimmerman are two of the best-known Super Smash Bros. players in the world.
