Yarane-da

A Yaraneeda has the body of what they possessed with fish-like gills on the sides of their face, with their facial expression making them look unmotivated. When it takes a target's Motivation Power, its eyes glow red and it smiles creepily.

They have the ability to take anyone's motivation, leaving the target not wanting to do anything, and powering itself up. However, it appears to not have any effect on the Pretty Cure.

(Source: Pretty Cure Wiki)