Goto Imasuji (今いま筋すじ強ごう斗と Imasuji Gōto?),[4] also known as Muscular (マスキュラー Masukyurā?),[5] later Jailbreaker (ダツゴク Datsugoku?),[2] is a villain affiliated with the League of Villains as part of its Vanguard Action Squad. He serves as a primary antagonist of the Forest Training Camp Arc. He was incarcerated in Tartarus,[6] being freed by All For One,[7] until he was once again defeated by Izuku Midoriya and imprisoned once again.