Kuromon Sumi

2nd year high school student.
A rare female shinigami, she's a 'shadow woman' youkai and can manipulate shadows.
Because she is a youkai that is born from darkness she doesn't have any relatives. Soon after she was born she was taken in by Renji and lives together with him.
In order to pay him back for taking care of her she is aiming to be the best shinigami.
However she is worried about how sometimes she gets an unexplained urge to kill humans.