Anyone who has seen it could never forget it.
But, if we are looking for "obscure, borderline useless super powers", I have one for you that is equal parts possibly OP, and squicky:
Control over normal speed evolution
(EG, evolution happens at the natural rate, but you can control it within the limiting bounds of what would normally be expected from the process.)
Why is this potentially OP?
The average human body's total cell count is approximately equaled by single celled organisms that are symbiotically tied to that human's metabolism.
https://www.sciencenews.org/article/body%E2%80%99s-bacteria-don%E2%80%99t-outnumber-human-cells-so-much-after-allThat, combined with a universe with genetic mutations that confer super powers, and horizontal gene transfer, the rate at which microbes mutate/evolve, and the mentioned super power, gives a recipe for a character that can exploit their bacterial genome for radically advanced super powers.
Naturally, this character would be an absolute health nut, who seriously cared *A LOT* about the kinds of food they eat, because they need to keep their bacterial colony in top shape for proper power manifestation.
Weaknesses: Antibiotic treated beef, certain forms of probiotic yogurt, broad spectrum antibiotics, and foreign germs that havent been carefully cultivated for their superpower granting potential. -- Psychologically: Dirty rooms, clutter and filth in general, stinky sweaty people, scary refrigerators, etc.