The pictures of demons below come from four different traditions. The first picture is a famous painting by Michael Alexandrovich Vrubel, the Seated Demon. Unlike most pieces of art, the demon here looks almost human.
The second picture is a statue of Chung Qai a Chinese demon, the Judge of Hell, standing on hellfire. It is from the Qing Dinasty, from the 17th century.
The third picture is a White Demon painting from Thailand.
The fourth picture is a modern demon, Lady Demon by fantasy painter Boris Vallejo.
Picture 1: Seated Demon (Vrubel)
Picture 2: A Chinese demon: Chung Qai
Picture 3: White Demon
Picture 4: Lady Demon (Vallejo)