Alien Mefilas was the original Alien Mefilas from Ultraman.
Subtitle: Malicious Alien (悪質宇星人 Akushitsu Uchūjin Malicious Space-man)
After admitting defeat and escaping from Ultraman, Alein Mefilas found himself mysteriously transported into the Kaiju Graveyard High school as a high school girl.
She along with Alien Temperor started the Ultra brothers
certain death annihilation research club