A Jubokko (joo-BOH-koh; Jap. 樹木子 "Tree child") is a type of tree that has a symbiotic relationship with Kinoshimobes to help protect its natural habitat. It survives on human blood. Any humans that are absorbed by a Jubokko will have their face appear as knots in the bark. These faces always have a horrified expression and appear to be screaming, perhaps in a state of purgatory for their crimes against nature. Should a Kinoshimobe get absorbed by a Jubokko, the resulting knot will be animated and sentient, able to move its eyes. Humans, Grimms, and Wesen alike all get an unnerving feeling when in close proximity to a Jubokko.