A friendly, non-scary ghost — used for Halloween content, playful spookiness, or jokingly implying someone was 'ghosted' (though the dating slang predates and is unrelated to this specific emoji's design). Its round, cartoonish shape deliberately avoids looking frightening, keeping it squarely in cute-monster territory rather than horror.
Keywords: boo, creature, excited, face, fairy, fairytale, fantasy, ghost, halloween, haunting, monster, scary, silly, tale