Knuckle Bine is an Unidentified Beast Hunter and Morel's apprentice. Despite appearing to be an aggressive man, Knuckle is very compassionate and easily moved to tears. Knuckle also gets along well with animals, having the habit of taking care of abandoned pets.

Knuckle has all the benefits granted by his status as a Hunter. He has demonstrated considerable physical combat skills, being able to fight enemies much stronger than him.