Meaning
A purple face with small devil horns and a mischievous grin. It stands for playful naughtiness: scheming, teasing, giving in to temptation or plotting something you know you should not do.
It is usually lighthearted: “Bought the cake for the diet group meeting 😈” Gamers and friends also use it to announce a cheeky plan or a victory. Unlike the angry devil face that frowns, this one smiles, so it reads as fun rather than menace. In some conversations it carries a flirtatious or suggestive tone, so think twice before adding it to messages for family or colleagues.