Doku Ryuuga: A Ninja like boy who has a snake always on its neck, the snake is alive btw, and will indeed attack someone who seems like a threat. Wears a bandanna to hide Snake fangs and uses poison tipped knives as weapons.
Akuryō Abhaya: She is the Fear teacher. She helps you get over your fears so it doesn't hold you back as fear is a common weapon used against you. Also the Satanist/Cult teacher for demons and helps with people with necromancy and curses. She goes by the Name Fear mostly.
Daichi: The snake on Doku's Neck
Doku: Guess what, I have flaws. What are they? I sing in the Shower I cry during romantic comedies. I spend too much time volunteering I-
Fear: You have killed over 80 people...
Doku: OKAY AND OCCASIONALLY I commit first degree murder happy now?
Daichi: sssssssss- =_=