It is literally the symbol for things that are not known so when I see it I think of unsolved mysteries, UFO sightings, dangerous cryptids, and the end of human civilization. The most terrifying thing of all is that a form of electromagnetic radiation is defined by this evil letter and if given in high doses can give you cancer. Also bones and skeletons are horrifying and all I think about is the hollowed remains of once living breathing beautiful human beings. This letter has 4 legs that can karate chop you while making high-pitched hi-ya! sounds as it’s body flashes to reveal its bones.