Mysterio is a fictional character from the Marvel Comics universe, primarily known as a villain of Spider-Man. Created by writer Roy Thomas and artist John Romita Jr., he first appeared in "The Amazing Spider-Man" #13 in 1964. Mysterio, whose real name is Quentin Beck, is a special effects artist and master illusionist who uses his skills to commit crimes and battle superheroes. Mysterio is recognized for his distinctive costume, which includes a fishbowl helmet and a green cape. He often employs elaborate illusions and holograms to confuse his opponents, making him a formidable foe. His character has appeared in various media, including animated series and films, notably portrayed by Jake Gyllenhaal in the movie "Spider-Man: Far From Home."