Negative Numbuh 86 is the negative-world counterpart to Fanny Fulbright/Numbuh 86 of the Kids Next Door.

Negative Numbuh 86, is almost always seen wearing a makeshift Samurai-style helmet which conceals her red, wavy, and frizzy hair, a green sweater with orange and yellow shaped circles on it with (which are part of her uniform as a KND operative and are taken off when she is inactive), an orange skirt and brown boots.

This Numbuh 86 is the evil and negative version, of the Positive Numbuh 86