I had a UV one (Batman-themed) on my arm
I say ‘had’ because it’s faded so much you can only find it in pitch black with a UV source if you know exactly where to look!
When I got it however it shone so much under UV it looked like it hovered above my skin, but nobody could see it during the day…

I guess the detective entourage are hoping Evilottie can’t track down the tattooist and find out what was inked behind Ethicalottie’s hairline