In real life, having red eyes is cause for medical concern, but in the world of anime and manga it can be one of the most evocative and expressive eye colors there is. Red-eyed characters often have some sort of mysterious power hidden within them that is beyond human understanding or they may bear some sort of demonic lineage. Their charm is apparent at first glance thanks to their jewel-like eyes.
Kurapika (from Hunter x Hunter) has his Scarlet Eyes on full display, which means someone has royally ticked him off.
Have any of the crimson gazes below caught your attention?