Sheryl is a petite and slim girl though quite pretty, with long dark hair and dark eyes. She is mostly seen wearing her school uniform.
Brave and caring though a bit naive, she seems to hold both Nichol and Fox in high regard. She might have romantic feelings for Nichol.
After finding out that Nichol is a Jackal she is sad and angry that he would be "a murderer" and that he kills innocent people for money, but after realizing that she will not be able to change Nichol's mind she makes him promise not to die.