The Midnight Angels was a group from Shonan before it disbanded and recreated again only to face its end for real. They are the antagonists near the end of the story in Shonan Junai Gumi. Featured in the 4th OVA.
The first leader burned the other leader because he found his ideas wrong.
Among the people in it after its 2 leaders was the abused Nagisa Nagase, who by time under bad influence from the leader developed a split personality going back and forth, confusing which is her real self, an ordinary girl or with them.
The leader lost to a bike death race against Onizuka and was sent to the hospital righ after, and also Nagisa came to her senses, to her true self as Ryuji Danma helped her.