Viper

Viper is a white half-human half-snake hybrid that's the manifestation of untied shoelaces. She is based off the shoelace snake hallucination in the episode "Your Shoe's Untied".

Overview
Viper is a kindhearted individual and will help one tie their laces if they don't know how. She upgraded into a human body to allow this to happen. She has white hair, purple eyes, and wears a white dress.

Trivia

 * Her Japanese seiyuu is Chika Sakamoto.