Vanguard Action Squad

The Vanguard Action Squad (開闢行動隊 Kaibyaku Kōdō Tai) is a group of ten elite, veteran Villains who are new recruits from the League of Villains. When all of the members gathered together, they launched an attack against the students of Yuuei, also making them the main antagonists of the School Trip Arc.

Plot
After Dabi and Himiko Toga's visit to the League of Villains, a plan was formed to take down the students of Yuuei. Both Dabi and Himiko Toga arranged for themselves and eight others to work together for a planned attack on the students of Yuuei at a camp site located in the mountain side. When seven members of the squad were gathered together, they launched a surprise attack against the camp while declaring themselves as part of the League of Villains.