From the introduction: Welcome to Textopolis! A city inside the teenager Alex’s phone. Run by the happy smiling emoji known as SMILER! YAY! And in this city emojis always have a set job! They have to be ready for Alex to select them so they can be sent out by text! Emojis are always expected to act like what their emoji represents. Emotion and people emojis are not allowed to express any other emotion than the emotion they are. Object emojis don’t seem to have this limitation.