You probably don't see too many people walking around in real life with yellow eyes. Unless someone's wearing cat-themed contact lenses, you tend to just see green, brown, and blue eyes everywhere. However, the pages of a comic book are not real life. Characters come from all over the universe; some even travel between different dimensions.
Yellow eyes seem to be popular with villains more than heroes in the pages of Marvel and DC. Raven Darkholme (AKA Mystique) is often drawn with striking yellow eyes, and she can even be seen wearing them in the X-Men film franchise. However, she's not the only yellow-eyed character; Grendel, En Sabah Nur, and Anti-Monitor have all sported yellow eyes at one point or another. That said, there are a number of superheroes who are also known for sporting yellow eyes. Nightcrawler is an easy example.
How many yellow-eyed comic book characters do you know? This list of male and female superheroes and villains with yellow eyes goes through a few dozen of the most popular, but there are honestly hundreds when you look back on comic book history. Vote up your favorite comic characters with yellow eyes, and add your own if they aren't already listed.
Apocalypse, also known as En Sabah Nur or "The First One", is a fictional supervillain that appears in American comic books published by Marvel Comics. He is an immortal mutant and is usually portrayed as one of the main antagonists of the X-Men. Created by writer Louise Simonson and artist Jackson Guice, Apocalypse first appeared in X-Factor #5. Since his introduction, the character has appeared in a number of X-Men titles including spin-offs and several limited series. The character has also been featured in associated Marvel merchandise including animated television series, feature films, toys, trading cards, and games. He is portrayed by Brendan Pedder in the 2014 film X-Men: Days of ...more on Wikipedia
Mystique is a fictional character who appears in American comic books published by Marvel Comics and in a number of movie, television, and video game adaptations, typically in fiction related to the X-Men. Created by artist David Cockrum and writer Chris Claremont, she first appeared in the comic book Ms. Marvel #16, published in 1978. Mystique is a member of a fictional subspecies of humanity known as "mutants", who are born with superhuman abilities. Mystique is a shapeshifter who can mimic the appearance and voice of any person with exquisite precision. She is typically a villain and foe of the X-Men. ...more on Wikipedia
As Seen In: X-Men: Legacy
Gamora is a fictional antiheroine that appears in comic books published by Marvel Comics. Created by Jim Starlin, the character first appeared in Strange Tales #180. Gamora is the adopted daughter of the supervillain Thanos, and the last of her species. Her powers include superhuman strength and agility and an accelerated healing factor. She has appeared as the occasional love interest of the superheroes Adam Warlock and Nova, and a member of the group known as the Infinity Watch. The character played a role in the 2007 crossover comic book event Annihilation: Conquest, and became a member of the titular team in its spin-off comic, Guardians of the Galaxy. She has been featured in a variety ...more on Wikipedia
Nightcrawler is a fictional superhero appearing in American comic books published by Marvel Comics, commonly in association with the X-Men. Created by writer Len Wein and artist Dave Cockrum, he debuted in the comic book Giant-Size X-Men #1. Nightcrawler is a member of a fictional sub-species of humanity known as mutants, who are born with superhuman abilities. Nightcrawler possesses superhuman agility, the ability to teleport, and adhesive hands and feet. His physical mutations include indigo-colored skin which allows him to become nearly invisible in shadows, two-toed feet and three-fingered hands, yellow eyes, pointed ears and a prehensile tail. In Nightcrawler's earlier comic book ...more on Wikipedia