#1 is Karma Akabane (Assassination classroom) (psycho, really smart and strong)
#2 is Mitsuba Sousuke (toilet bound hanako kun) (Its a boy not a girl)
#3 is Ram (Re:Zero − Starting Life in Another World) (has a twin named Rem)
$4 is Yugi Tsukasa (Toilet bound hanakokun) (psycho has a twin named Hanako)