A face with a straight-line mouth and small eyes, surrounded by dotted lines, seems like have no emotion
😐. It has shallower skin color than usual emojis. It is a new emoji included in Emoji 14.0, which is released in September 2021. This emoji means disappear, hide or invisible. It can also express feelings like depress, lonely or being isolated. Related emojis:
😑😶😐
💡: In comics or manga
📕, dotted lines around a light-colored character is an old-school way to represent this character is invisible.