a random character design idea i came up with! with every step or touch they leave an inky pawprint wherever they go, although most of the time they wear caps on their feet as shoes to keep the ink from ruining any floors, and gloves to be able to touch things without ruining them. they always smell like fresh stamp ink! and the ink is completely non-toxic and tastes like black licorice (or if you dislike black licorice, a very powerful blueberry flavor)
and by dipping their feet/hands into different colored buckets of ink, they can temporarily change the color of their pawprints/handprints (although the default is black).
also... if they kiss you, it leaves a inky black mark in the shape of a kiss :'D