he is a genius then Shiba is over-talented. The Demon who killed Mio's adoptive parents and Zest's former master, and who plans to turn on Leohart and obtain the Demon King's powers for himself by kidnapping Mio without Leohart's knowledge. After he is defeated, Lars captures, tortures, and finally kills him in the presence of Basara. The current Demon Lord and younger brother of the demon Riara. A teacher at Hijirigasaka Academy. Initially assumed to be a human, it is revealed that he is actually a god like Hasegawa. He is intent on killing Basara, who he believes has reached beyond his stature through earning Hasegawa's affection, and believes that killing him will bring Hasegawa back to heaven. After using Kurumi as a hostage to prevent Basara from attacking, he then succeeds in cutting off Basara's sword arm. However, this causes the sword to react and release the spirit of Brynhildr, one of the most powerful Valkyries. In this form Basara's arm grows back, his hair changes color and his right eye glows. He moves so fast that Sakasaki cannot even see him, and he cuts off the top of his foot using Banishing Shift, which he could earlier only use as a counter, not as an attack. Basara attempts to kill Sakasaki but Hasegawa intervenes. She then reveals that she always knew that Ornis has replaced the real Sakasaki. Using her full power, Hasegawa kills Ornis and has Basara take the credit for killing the god. Media Light novels The first light novel volume was published on September 29, 2012, under Kadokawa Shoten's Kadokawa Sneaker Bunko imprint. The thirteenth and last volume has been published on March 31, 2021. Manga A manga adaptation with art by Kashiwa Miyako began serialization in Kadokawa Shoten's shōnen manga magazine Shōnen Ace in the July 2013 issue, released on May 25, 2013. A second manga adaptation, titled , focusing on the antics of Maria with art by Fumihiro Kiso, began serialization in Hakusensha's seinen manga magazine Young Animal Arashi on February 7, 2014. Both series have been licensed for publication in North America by Seven Seas Entertainment. Anime An anime television adaptation premiered on January 7, 2015. The opening theme is "Blade of Hope" by sweet ARMS and the ending theme is "Still Sis" by Kaori Sadohara. A second season titled The Testament of Sister New Devil BURST premiered on October 9, 2015.