Sannomaru is a nineteen year old demon slayer and the daughter of the mysterious winter witch. Sannomaru or Sanno as she likes to be called was raised by the three sisters a trio of witches who took her from her mother on the day she was born. Sanno does not know the face or name of her parents but it is presumed that she has powers that rival her mothers although she chooses not to use them. Sanno is proficient in many weapons as the trio taught her from a young age. Sanno often laments how she was not able to have a proper childhood and thus doesn't have many friends as the trio had to approve them all before she could play with them.