Talk:Chara/@comment-35030974-20191218015219/@comment-38493938-20191218182337

It's primarily an artistic choice that was inspired by Chara also likely having a red SOUL. It also adds a uniqueness to their character, and is a popular distinction among fans, like how Papyrus's eye is often depicted as glowing orange. Along with that, many comics that make their own attempts at replicating how they imagined Chara's past use the red eyes as a reason for them to be ostracized by humans in the first place.