>>28229058No eyes is a common Japanese art cliche, they usually use it to add anonymity/mysteriousness to characters that usually don't show up in person.
Other examples with eyeless characters would be in games/VN with a self-insert, where their faces are usually covered or not drawn with eyes, since those are generally the most identifying feature of a character, and they want to leave it to player interpretation.
It can also be done at times just to make a character look creepy, dramatic, or upset.
