Boris Cliff

Boris Cliff (ボリス・クリフ, Borisu kurifu) is a supporting character in BNA: Brand New Animal. He was the trainer for Nazuna Hiwatashi and was a leader in the Silver Wolf Order cult.

Appearance
Boris Cliff has long, blond hair and a square jaw. His outfit consists of a white coat, gray gloves, and a teal priest uniform. He is always seen wearing a gray mask with wolf-related embellishments.

After the destruction of the Livestream concert, he revealed a corrupted version of his beastman form due to the Nirvasyl Syndrome which is a multi-headed snake with crimson eyes and sharp fangs.

Personality
He is best described as cold, calculative, and manipulative. He took advantage of the commotion during Jackie's witch trial to convert more people to the cult and to seek residence for the cult in the Slums.

He is also creepy and caresses Nazuna like his doll to further the cult. He even tries to murder her when having fallen under the influence of the Nirvasyl Syndrome after she breaches her alliance with him. However, it is implied he might have some kind of sexual attraction to her and actually tried to rape her rather than kill her when the syndrome corrupted him.

Background
After Nazuna's transformation, she is abducted and taken to a research facility. Boris Cliff breaks her out and trains her to develop the transformation powers even further.

Eventually, they join the Silver Wolf Order and Nazuna assumes a wolf appearance and the role of Déesse Louve. He continues to serve as her trainer and pull the strings behind the scenes.

Brand New Animal
Boris Cliff and the Silver Wolf Order sail to Anima City and arrive at the Slums. He appeases to the residents of the Slums and with the help of Nazuna's wolf appearance, they all bow and accept the cult with open arms. The cult sets up residence in the area and await a meeting with the Mayor. At night, Boris Cliff is seen caressing Nazuna as they discuss matters concerning the Mayor. Michiru also meets with Boris and is disgusted by him.

Boris and Nazuna later hold a rally of the cult and its believers in front the Sylvasta Pharmaceuticals Medical Center when they were refused sanctuary in Anima City by Mayor Rose due to concerns from the company. The entire gathering then pray at Boris' instruction. As Alan comes out to meet them, he is attacked by the terrorist Meteor only to be saved by Nazuna (who reveals she can grow wings and fly) as Boris highlights to all present how Ginrou's grace extends to humans as much as beastmen. After reaffirming the people's faith, Boris points out to the rescued Alan he must not disregard the people's praise for Ginrou and that he owed them for saving his life. With no other alternative, Alan absolves the cult of any concerns or suspicions as he and the mayor allow the cult to take up full residence in Anima City.

Boris is later escorted into the Anima City prison by Inspector Yuji Tachiki to meet with Hiromu Yaba on the grounds of "teaching a sinner". After the inspector and the other authorities leave the interrogation room, Boris locks the door and confronts Yaba who defiantly denounces the name of Ginrou. Boris merely takes the insult in stride as Yaba seems to recognize who Boris is as the later confirms that they had indeed met sometime before in the past; only Yaba never knew his name and saw him in a different form then. Boris then promptly declares his intent to "expose his sin", mocking the now nervous former doctor on his actions and how Alan Sylvasta would do even worse to him should the truth of his actions ever come out. Later, Boris is seen by Michiru leaving the station just before Yaba mutates into a gigantic rhino-like monster and goes on a rampage through the city with Boris watching on from afar.

Trivia

 * Boris' appearance, a silver mask covering his eyes, and blond hair, as well as his voice actor Takehito Koyasu, are a reference to the character Zechs Merquise from the anime series Mobile Suit Gundam Wing.
 * In the English dub, his name is swapped around to Cliff Boris.